Developer Tools Startups funded by Y Combinator (YC) 2024

March 2024

Browse 100 of the top Developer Tools startups funded by Y Combinator.

We also have a Startup Directory where you can search through over 4,000 companies.

  • GitLab
    GitLab (w2015)Public • 2,000 employees • San Francisco, CA, USA
    GitLab is the first single application for the entire DevOps lifecycle. Only GitLab enables Concurrent DevOps, unlocking organizations from the constraints of today’s toolchain. GitLab provides unmatched visibility, radical new levels of efficiency and comprehensive governance to significantly compress the time between planning a change and monitoring its effect. This makes the software lifecycle 200% faster, radically improving the speed of business. GitLab and Concurrent DevOps collapses cycle times by driving higher efficiency across all stages of the software development lifecycle. For the first time, Product, Development, QA, Security, and Operations teams can work concurrently in a single application. There’s no need to integrate and synchronize tools, or waste time waiting for handoffs. Everyone contributes to a single conversation, instead of managing multiple threads across disparate tools. And only GitLab gives teams complete visibility across the lifecycle with a single, trusted source of data to simplify troubleshooting and drive accountability. All activity is governed by consistent controls, making security and compliance first-class citizens instead of an afterthought. Built on Open Source, GitLab leverages the community contributions of thousands of developers and millions of users to continuously deliver new DevOps innovations. More than 100,000 organizations from startups to global enterprise organizations, including Ticketmaster, Jaguar Land Rover, NASDAQ, Dish Network and Comcast trust GitLab to deliver great software at new speeds.
    developer-tools
    devsecops
    open-source
  • Amplitude
    Amplitude (w2012)Public • 750 employees • San Francisco, CA, USA
    Since graduating from YC, Amplitude (W12) has made it to IPO and beyond by helping cutting edge startups become category leaders. We’ve pioneered the digital analytics category to become the go-to solution for AI pioneers (Cruise, Midjourney), apps that touch millions of consumers (Doordash, Coinbase), and the best in B2B (Atlassian, Rippling, Canva). With product analytics, experiment, CDP, session replay, and more, Amplitude’s digital analytics platform shows you what your users love, where they’re getting stuck, and what keeps them coming back. You want to build a generational business, and we have the capabilities and pricing plans to guide you every step of the way. Check out our special deal for YC companies and get started on your analytics journey.
    developer-tools
    b2b
    analytics
    marketing
    data-visualization
  • Retool
    Retool (w2017)Active • 300 employees • San Francisco, CA, USA
    Retool is the fast way to build internal tools.
    developer-tools
  • Algolia
    Algolia (w2014)Active • 810 employees • San Francisco, CA, USA
    Our mission is to make every search interaction meaningful & rewarding, through developer-friendly and enterprise-grade APIs. Algolia is the leading Search & Discovery API for websites and mobile apps. We help the most innovative companies across e-commerce, media and SaaS industries create powerful, relevant and scalable discovery experiences for their users. Unlike other solutions, our hosted platform reduces the complexities of building and scaling a fast, relevant digital experience and helps teams accelerate development time. More than 9,000 companies like Under Armour, Twitch, Periscope, Medium and Stripe rely on Algolia to manage 50+ billion search queries a month. Founded in 2012, we're backed by $184M in funding from Accel Partners, Alven Capital, Point Nine Capital and Storm Ventures. The team is headquartered in San Francisco with offices in Paris, London, New York, and Atlanta. To learn more, visit www.algolia.com. --- We’re looking for talented, passionate people to build the world’s best search technology. As an ownership-driven company, we seek team members who thrive under autonomy and diversity. We're committed to building an inclusive and diverse workplace. We care about each other and the world around us, and embrace talented people regardless of their race, age, ancestry, religion, sex, gender identity, sexual orientation, marital status, color, veteran status, disability and socioeconomic background
    developer-tools
    saas
    b2b
  • Mux
    Mux (w2016)Active • 140 employees • San Francisco, CA, USA
    Mux is an API-first video platform designed by experts to make world-class video streaming and analytics possible for every development team. Self-optimizing videos take the guesswork out of encodings, delivery, and renditions. Mux makes your video look beautiful on every device, every time. We offer two products, Mux Video and Mux Data. Mux Video is a simple API to advanced video streaming. Powered by data and designed by video experts, Mux Video makes beautiful video possible for every development team. Post a video or live stream with a single API call, and watch it within seconds. Mux Video handles the encoding, storage, and delivery. QoE and performance analytics provided by Mux Data is included by default for every Mux video stream.This real-time data is used to create the right renditions for every device and title, resulting in greater reliability and better viewer experiences. Mux Data is a Quality of Experience analytics platform that measures the performance metrics that actually matter to viewers: rebuffering, startup time, video quality, and errors. Our intuitive dashboard quickly gives users the insight to find issues and make improvements through features like A/B testing, industry-wide scores, alerts, and detailed information about every single video view. The product works out of the box on HTML5, iOS, Android, and major OTT platforms. All data is available via exports and APIs, making it easy to integrate Mux Data into other systems.
    developer-tools
    video
    api
  • Apollo
    Apollo (s2011)Active • 200 employees • San Francisco, CA, USA
    Apollo GraphQL is the leader in open source and commercial GraphQL technologies. Apollo’s open-source GraphQL client, server, and gateway are downloaded more than 17M times per month and used in production by over 30% of the Fortune 500. Customers like Walmart, Expedia, Glassdoor, Audi, and PayPal, use the Apollo Graph Platform to unify their GraphQL efforts, collaborate on graph development, and safely iterate on their graphs. Based in San Francisco, Apollo is backed by Insight Partners, Andreessen Horowitz, Matrix Partners, Trinity Ventures, Y Combinator and individual investors.
    developer-tools
    open-source
    graphql
  • Airbyte
    Airbyte (w2020)Active • 110 employees • San Francisco, CA, USA
    Airbyte is the leading open-source ELT platform that replicates data from applications, APIs & databases to data warehouses, data lakes, and other destinations. https://github.com/airbytehq/airbyte
    developer-tools
    open-source
    data-engineering
  • Teleport
    Teleport (s2015)Active • 200 employees • Oakland, CA, USA
    Our open source Infrastructure Access Platform helps developers and security professionals to simplify secure access to servers, Kubernetes, internal web apps, databases, and cloud provider APIs across all environments.
    developer-tools
    devsecops
    next-gen-network-security
  • Sendbird
    Sendbird (w2016)Active • 300 employees • San Mateo, CA, USA
    At Sendbird, we are building the world's leading conversations platform for mobile apps. We power over 300M+ people's conversations every month and we are working with the leading customers such as DoorDash, Reddit, Yahoo!, PayPal, Walgreens, and have raised $220M+ in total funding from ICONIQ, Tiger Global, Meritech, Emergence, SoftBank Vision Fund, Steadfast, Shasta, and August.
    developer-tools
    saas
    b2b
    messaging
    enterprise
  • Replit
    Replit (w2018)Active • 115 employees • San Francisco, CA, USA
    Replit is the world-leading collaborative browser-based development environment -- learn, create & deploy! Join a community of 20m+ developers.
    developer-tools
    collaboration
  • QuickNode
    QuickNode (w2021)Active • 107 employees • Miami, FL, USA
    Web3 developer platform to build, test, and scale blockchain applications. Lightning fast access to 27+ chains like Ethereum, Bitcoin, Solana, Polygon, Optimism, Arbitrum, Avalanche, Near, Stacks, Flow, Tron, zkSync and more. Elastic APIs, storage (IPFS), powerful tools, analytics, and a 3rd-party marketplace -- all at your command through a simple control panel. Build your next big thing on-chain! Build it with QuickNode.
    developer-tools
    saas
    crypto-web3
    api
  • Supabase
    Supabase (s2020)Active • 70 employees
    Supabase is the easiest way to get started with Postgres. Each project within Supabase is an isolated Postgres cluster, allowing customers to scale independently, while still providing the features that you need to build: instant database setup, auth, row level security, realtime data streams, auto-generating APIs, and a simple to use web interface. We are 100% remote.
    developer-tools
    open-source
    big-data
    data-engineering
    databases
  • Alpaca
    Alpaca (w2019)Active • 150 employees • San Mateo, CA, USA
    Alpaca is an API infrastructure and licensed financial services company that allows developers and businesses to offer stock and crypto investing to their end-customers. We work with more than 100 companies across the globe to enable their investing products, and our mission is to provide financial services to everyone on the planet. Alpaca’s globally distributed team consists of developers, traders, and brokerage business specialists and backed by a group of well-capitalized investors including Portage Ventures, Spark Capital, Tribe Capital, Unbound, Social Leverage, Horizons Ventures, Y Combinator as well as highly experienced industry angel investors and founders. We are also very tech-enthusiastic with notable track records in open-source and startup communities.
    developer-tools
    fintech
    api
    investing
    infrastructure
  • Bitrise
    Bitrise (w2017)Active • 243 employees • Budapest, Hungary
    Bitrise helps you automate your daily app development tasks from building through testing to deployment. With Bitrise you can configure these tasks with a unique, visual workflow editor, with dozens of service integrations ready to roll. We call these steps, and they are all open source! If the step you need is not in our collection you can create your own and share it with others. Project Managers can get a clear picture of the development and testing of apps, testers get regular notifications about available, testable builds, and clients are able to collaborate with the rest of the team. Bitrise is free to get started and takes just 50 seconds to setup your first project.
    developer-tools
    devsecops
    saas
    b2b
  • Instabug
    Instabug (w2016)Active • 190 employees • San Francisco, CA, USA
    Monitor, prioritize, and debug performance and stability issues throughout the entire mobile app development lifecycle.
    developer-tools
    saas
    b2b
  • Mezmo
    Mezmo (w2015)Active • 172 employees • San Jose, CA, USA
    Mezmo, formerly LogDNA, is an observability platform to manage and take action on your data. It ingests, processes, and routes log data to fuel enterprise-level application development and delivery, security, and compliance use cases. Mezmo was brought to life by three-time co-founders Chris Nguyen and Lee Liu and included in the Winter 2015 batch of Y Combinator. In 2018 the company partnered with tech giant, IBM, to become the sole logging provider for IBM Cloud. Mezmo is on a mission to empower people who build solutions that shape the world. We’re doing this by delivering a platform that enables enterprises to get more value from their observability data in real time, regardless of source, destination, use case, or scale. We’re not the only ones working on this problem but we have a few things the others don’t. We’re cloud-native and know how to make the most of modern technology like Kubernetes. We have scaled a solution from zero to petabyte scale in a short amount of time, while supporting thousands of active users across multiple environments. We are hungry for change and are surrounded by enterprises telling us they’re hungry, too. We have a kick-ass group of people who are thinking about the problem analytically and are excited to change the observability world for the better. Mezmo has helped some of the world’s most innovative companies transform how they manage their systems and applications. Still, we know that we can help them get more value from their observability data by providing more flexibility and control over how they use it. This will enable teams to spend less time switching between data silos so they can focus on shipping better, more resilient, and secure products. We have momentum on our side. Last year we saw triple digit revenue growth and added 800 new customers to our roster. Recent accolades include being named to YC’s Top Companies, CRN’s 10 Hottest DevOps Startups, and EMA’s Top 3 Observability Platforms.
    developer-tools
    devsecops
    saas
    kubernetes
    data-engineering
  • HackerRank
    HackerRank (s2011)Active • 300 employees • Mountain View, CA, USA
    HackerRank, the developer skills company, helps businesses attract, evaluate and hire the best technical talent from around the world. More than 2,800 customers across all industries, including over 25% of the Fortune 100, rely on HackerRank to raise their hiring bars. More than 18 million developers (approximately 40% of the global developer population) trust HackerRank to learn and showcase their coding skills. Every second, two developers complete a HackerRank code submission, or 185,000 per day.
    developer-tools
    recruiting
  • Duffel
    Duffel (s2018)Active • 70 employees • London, UK
    Any business - from travel startups to financial enterprises - can build with Duffel. Shop flights and accommodation, purchase extras, manage bookings and more.
    developer-tools
    airplanes
    travel
    api
    transportation
  • RevenueCat
    RevenueCat (s2018)Active • 60 employees • San Francisco, CA, USA
    RevenueCat is a mobile SDK and API for managing in-app subscriptions We take the sting out of supporting the complicated subscription systems of the App Store and Google Play Store, and help you focus on running your business.
    developer-tools
    subscriptions
  • OneSignal
    OneSignal (s2011)Active • 150 employees • San Mateo, CA, USA
    OneSignal is the leading omnichannel customer engagement solution, powering personalized customer journeys across mobile and web push notifications, in-app messaging, SMS, and email. Our easy-to-use interface empowers content creators to focus on quality user engagement instead of complex implementation. Our powerful platform enables over a million businesses to deliver 10 billion messages daily and 1 in 7 new apps launches using OneSignal! We support companies in 140 countries, including Zynga, USA Today, Bitcoin.com, Upwork, Tribune, and many more - from startups and small businesses just getting off the ground to established companies communicating with millions of customers.
    developer-tools
    saas
    b2b
    messaging
    marketing
  • Embrace
    Embrace (s2019)Active • 100 employees • Los Angeles, CA, USA
    *S19 and YCG F21* Embrace empowers engineers to manage the complexity of mobile to build better, bolder experiences. At a time when mobile is more crucial than ever, teams often face fragmented solutions, missing data, and an inability to surface issues. With Embrace, engineers can identify and prioritize the impact of any issues with detailed behavioral and technical context to resolve them instantly. By eliminating guesswork, Embrace illuminates opportunities to perfect performance and build the best mobile experiences possible.
    developer-tools
    saas
    analytics
  • Armory
    Armory (w2017)Acquired • 90 employees • San Mateo, CA, USA
    Your software is your competitive advantage, and your customer experience is everything. Armory Continuous Deployment solutions empower you and your teams to confidently deploy every application, every time; safely and securely, so you can accelerate your time-to-market, increase stability, and decrease customer-impacting issues.
    developer-tools
    devsecops
  • Daily
    Daily (w2016)Active • 62 employees • San Francisco, CA, USA
    Daily is the developer platform for real-time video. Whether you are implementing 1:1 video calls or 100,000 participants in a real-time live session, our APIs give you easy, flexible, powerful building blocks. SDKs for the web, iOS, Android, React Native, and Flutter.
    developer-tools
  • Dagger
    Dagger (w2019)Active • 22 employees • San Francisco, CA, USA
    Dagger is a programmable CI/CD engine that runs your pipelines in containers. Develop your pipelines as code, in the same programming language as your application. Choose your SDK and start coding! Dagger executes your pipelines entirely as standard OCI containers. This has several benefits: - Instant local testing - Portability: the same pipeline can run on your local machine, a CI runner, a dedicated server, or any container hosting service. - Superior caching: every operation is cached by default, and caching works the same everywhere - Compatibility with the Docker ecosystem: if it runs in a container, you can add it to your pipeline. - Cross-language instrumentation: teams can use each other's tools without learning each other's language.
    developer-tools
    devsecops
  • Bitmovin
    Bitmovin (s2015)Active • 145 employees • San Francisco, CA, USA
    Bitmovin has been a first mover in almost every significant development in online video, from building and deploying the world’s first (and fastest) commercial adaptive streaming (MPEG-DASH/HLS) HTML5 Player, to being the first to achieve 100x realtime encoding speeds in the cloud. Bitmovin provides HEVC as well as VP9 live streaming with 60FPS and 4K resolution, and built the first containerized video encoding solution with Docker and Kubernetes. Bitmovin products are completely in-house developed, easy and fast to integrate and highly customizable. In combination with our great support, documentation and SLAs, this is a true enterprise offering. To find out more about Bitmovin’s video infrastructure solutions, or about any individual products, contact sales@bitmovin.com, or visit our website: bitmovin.com
    developer-tools
    video
  • AssemblyAI
    AssemblyAI (s2017)Active • 65 employees • San Francisco, CA, USA
    AssemblyAI is an applied AI company. We research, train, and deploy State-of-the-Art AI models for developers and product teams to integrate into their products/apps. Today, we offer AI models for audio transcription, content moderation, summarization, topic detection, and many other tasks. We are working towards building the "Stripe for AI models" - where developers and product teams will be able to easily access State-of-the-Art AI through a simple API. We're a fully remote team of AI researchers and ML engineers, and have raised over $65M in funding from top investors including Accel, Insight Partners, Y Combinator, John/Patrick Collison, Daniel Gross, and Nat Friedman.
    artificial-intelligence
    deep-learning
    developer-tools
  • Rutter
    Rutter (s2019)Active • 24 employees • San Francisco, CA, USA
    Rutter is building a universal API for e-commerce platforms, accounting systems and payment processors. Similar to the financial market before Plaid, the world of business financial data is split across hundreds of platforms like e-commerce storefronts, marketplaces, accounting systems and payment processors, such as Shopify, Amazon, Quickbooks, Netsuite, Stripe and others. Each of these platforms has its own app store or its equivalent, and the enterprising developer must spend thousands of hours building integrations in order to access the entire market. Rutter is an integration layer for any company building integrations into commerce or accounting platforms. You can learn more about our universal API here: https://www.rutter.com/
    developer-tools
    fintech
    b2b
  • Doppler
    Doppler (w2019)Active • 25 employees • San Francisco, CA, USA
    Your central source of truth from local development to production for every language, stack, and infrastructure.
    developer-tools
    devsecops
    saas
  • GitPrime
    GitPrime (w2016)Acquired • 110 employees • Durango, CO, USA
    Acquired by Pluralsight in May 2019
    developer-tools
    saas
    b2b
  • Roboflow
    Roboflow (s2020)Active • 40 employees • San Francisco, CA, USA
    Roboflow enables developers to make the world programmable. Use our tools to build better datasets (collect image, video / annotate), models (foundation and fine tuned small models), and deployments (self hosted, edge, APIs, SDKs) for computer vision. Over 250k developers, including those from over half the Fortune 100, build with our open source and hosted tools. Build with us: https://app.roboflow.com Hack with us: https://roboflow.slab.com/public/posts/roboflow-hackathons-external-u478m1iz Work with us: roboflow.com/careers
    artificial-intelligence
    developer-tools
    machine-learning
    computer-vision
    api
  • imgix
    imgix (s2011)Active • 65 employees • San Francisco, CA, USA
    Nobody should have to employ expensive imaging scientists and engineers for their business to get the most out of their visual media. This is where imgix has your back. imgix is a platform for managing, processing, rendering, optimizing, and delivering your existing visual assets so that you can meet the demands of your business and your team can stay focused on what they do best. The business demands on web visual media can blindside even the most hyper-aware content teams and developers. Just to be competitive on the Internet, you need your images to be sized perfectly to every device, served in one of any of a half dozen web formats, optimized to the absolute best perceptual quality while maintaining pinpoint performance, and distributed to wherever your users are, anywhere in the world. And that is just the baseline. Next-level imaging concerns like copyright, licensing, accessibility, moderation, illegal or explicit content, "fake news", and more, can threaten your business at any moment if not handled properly. Get any of these things wrong and you are shedding revenue, ceding ground to competitors, and potentially exposing your business to extreme liability. By working with imgix's powerful APIs, SDKs, user interfaces, and integrations, you can rest assured that any demands on your images and videos will always be met, now and into the future, without you having to invest in building it yourself or patching together a mishmash of open source and third-party technologies. Our platform is designed to ensure that your images are always working for your business and never against it. imgix was launched through the famed Y Combinator accelerator program. Its customers include Google, Lyft, Kickstarter, AirBnb, Coursera, Bonobos, Spotify, Vimeo, Bustle, and many others.
    developer-tools
    saas
    video
  • Release
    Release (w2020)Active • 26 employees • Los Angeles, CA, USA
    Release delivers staging environments as a service. With Release a staging environment is automatically generated with every Pull Request which removes the bottleneck most companies have when they only have a single staging environment.
    developer-tools
    saas
    kubernetes
  • Zeplin
    Zeplin (s2015)Active • 140 employees • San Francisco, CA, USA
    Zeplin is an organized workspace to publish finalized designs, where the entire team can collaborate to ship beautiful products together. We were founded in 2014 and today we are honored to support 5+ million users from thousands of product teams including Apple, Starbucks, Salesforce, Amazon, Microsoft, Audi and many more. We’re a Y Combinator startup, also backed by amazing investors like Elad Gil, Mike Maples, Kevin Hale. We’re a distributed crew with offices in San Francisco, Istanbul and London. We're Hiring! Please apply directly on Zeplin's job site: https://zpl.io/jobs
    developer-tools
    saas
    design-tools
  • Aptible
    Aptible (s2014)Active • 25 employees • San Francisco, CA, USA
    At Aptible, we envision a world where developers achieve more with less infrastructure. We’re building the platform that empowers developers at companies of all stages of development to move beyond the traditional method of managing infrastructure—DIY with expert infrastructure and platform engineers on AWS, GCP, or Azure. We’ve done this through our secure, compliant, reliable, and scalable Platform as a Service that’s been used by thousand of developers, hundreds of companies, and dozens of publicly traded and unicorn companies since 2013.
    developer-tools
    devsecops
    devops
    web-development
    cloud-computing
  • SnapMagic
    SnapMagic (s2015)Active • 28 employees • San Francisco, CA, USA
    Built by electrical engineers for electrical engineers, SnapMagic removes monotony so that engineers can do their best work. SnapMagic’s electronic component data is used by over 1.5 million engineers across the world’s largest organizations. Its new AI Copilot will change the way that every engineer designs electronics. Join at www.snapmagic.com.
    developer-tools
    hardware
    marketplace
    ai
  • Memfault
    Memfault (w2019)Active • 50 employees • San Francisco, CA, USA
    Memfault is the first IoT reliability platform that empowers teams to build more robust devices with software at scale. We believe that device reliability engineering will transform how developers build and operate IoT and edge devices with more productivity and more collaboration. As IoT applications continue to grow in complexity, it is more important than ever for developers to have Memfault’s performance monitoring, device debugging, and OTA update capabilities built into their fleet of devices for proactive device operations. We built Memfault to enable developers with a more scalable and sustainable process to accelerate go-to-market, de-risk product launches, cut product costs, and deliver overall superior products.
    developer-tools
    saas
    iot
  • Metoro
    Metoro (s2023)Active • 2 employees • San Francisco, CA, USA
    Metoro is the AI-powered production debugger. Software Engineers can ask Metoro questions like “why is my webapp down?” and Metoro will investigate, find a root-cause, create bespoke dashboards and surface relevant metrics and logs. We're a team of software engineers from Palantir and Jump Trading who have spend our careers building distributed systems, and we're building the tool we wished we had. Live demo at https://metoro.io
    developer-tools
    generative-ai
    devops
    infrastructure
    ai
  • Hatchet
    Hatchet (w2024)Active • 2 employees • New York, NY, USA
    Hatchet abstracts away the infrastructure for managing task queues and message brokers, so you can focus on writing your background task and workflow logic. With Hatchet, you can run slow OpenAI requests in the background with async tasks, chain complex tasks together into workflows, and set retries and timeouts to recover from failure.
    developer-tools
    open-source
    infrastructure
  • ElectroNeek
    ElectroNeek (w2020)Active • 175 employees • Austin, TX, USA
    We help Enterprises transform their business processes with AI and enable effective collaboration between employees and Software Bots. Awesome YC deals for founders (check out us in 'Deals'). Connect any system, automate any process.
    developer-tools
    robotic-process-automation
    b2b
  • Titan
    Titan (w2024)Active • 1 employees
    Titan is a data security platform for Snowflake. Data engineering teams trust Titan to simplify access management, ensure compliance, and minimize risk.
    developer-tools
    open-source
    cybersecurity
    data-engineering
  • SST
    SST (w2021)Active • 3 employees • Toronto, ON, Canada
    SST is an open source application framework that makes it easy to build full-stack applications.
    developer-tools
    open-source
  • Dioxus Labs
    Dioxus Labs (s2023)Active • 1 employees • San Francisco, CA, USA
    Dioxus makes it easy for developers to quickly build, test, deploy, and manage apps on every platform. We support building and deploying apps for the web, desktop, mobile, AR/VR, and many other exotic targets.
    developer-tools
    open-source
    web-development
  • Retell AI
    Retell AI (w2024)Active • 5 employees • San Francisco, CA, USA
    We help developers implement human-like voice agents in a day instead of months. Plug in your LLM, a voice agent is born! From AI-powered call agents to voice-enabled coaching apps and lifelike companions, we are your trusted ally in turning these visions into reality. Although Voice AI has been around for some time, it hasn't yet become effective enough for mainstream use, primarily because of poor user experience. Conversational flows often feel awkward with unnatural pauses and interruptions, requests are frequently misunderstood, and voices sound robotic or overly dramatic. On top of that, setting up such a Voice AI system can require upwards of 100 hours of frustrating development. By offering a truly conversational, fast, and empathetic Voice AI that can be easily configured for any industry and integrated into any product, we aim to push the boundary of user-friendliness to a new level, reaching the threshold for mainstream adoption of Voice AI. We are at a pivotal moment in history where Voice AI will become the primary interface for accessing products and services, revolutionizing our interactions with machines for the better. Retell AI is at the forefront of creating this new reality.
    artificial-intelligence
    developer-tools
    b2b
    api
    conversational-ai
  • Metaplane
    Metaplane (w2020)Active • 12 employees • Boston, MA, USA
    Metaplane ensures everyone trusts the data that powers your business. Data teams at Bose, Ramp, and Klaviyo use our data observability platform to prevent and detect data issues — before the CEO pings them about weird revenue numbers. We do this with ML-based anomaly detection, end-to-end column-level lineage, and tools to help prevent incidents before they occur. You can monitor your entire data stack within 30 minutes. The company is backed by Khosla Ventures, Y Combinator, and the founders of Okta, HubSpot, and Vercel.
    developer-tools
    saas
    data-engineering
  • Cedana
    Cedana (s2023)Active • 4 employees • New York, NY, USA
    Cedana (YC S23) enables real-time save, move and restore for compute workloads.  We expand GPU capacity, increase reliability, reduce latency up to 10x and increase CPU/GPU utilization up to 5x resulting in significant cost savings. OpenAI, Meta and Microsoft have flavors of these capabilities internally and we’re bringing them to everyone.  Our solution applies to AI training and inference, HPC, data analysis, dev tools and infra.  Our vision is to transform cloud compute into a real-time, arbitraged commodity.  We are a fully distributed remote company. https://www.cedana.ai
    deep-learning
    developer-tools
    cloud-computing
    infrastructure
    ai
  • Contour
    Contour (s2023)Active • 2 employees • San Francisco, CA, USA
    Contour is building next-generation quality assurance to free engineering time and test products, end-to-end. PMs can input product requirements to auto-generate testing suites, informed by real user behavior data.
    developer-tools
    generative-ai
    b2b
    workflow-automation
    enterprise-software
  • Onedoc
    Onedoc (w2024)Active • 3 employees • Paris, France
    Onedoc is an API for generating custom PDF Documents. Businesses generate more than 1.2 billion PDFs every day. We make it easy to create these documents with the modern tools they use for web development. PDFs remain a cornerstone of modern business, yet nothing has significantly changed in decades. People are still generating ugly, static documents using outdated libraries and software. At Onedoc, we aim to revolutionize the way your company utilizes PDFs. By offering a straightforward API and a comprehensive web platform, you will be able to: 1. Create PDFs using the latest web technologies, which developers know and love. 2. Generate dynamic content on the fly, including database information, AI-enhanced copy, A/B testing, and complex signature workflows. 3. Host your documents and share them directly with your colleagues and customers securely. 4. Track usage for each of your documents, identifying "who did what, and when?" Tired of your current document management system? Try Onedoc today and enhance your brand and customer experience.
    documents
    developer-tools
    b2b
    api
  • webapp.io
    webapp.io (s2020)Active • 4 employees • Toronto, ON, Canada
    Webapp.io's custom hypervisor makes webapp CI/CD, E2E testing, and preview environments as simple as writing a Dockerfile. If your team is building a webapp + using github/gitlab/bitbucket, please reach out!
    developer-tools
    saas
    b2b
  • Aviator
    Aviator (s2021)Active • 6 employees • San Francisco, CA, USA
    Aviator is a developer tool that automates merge workflows and keeps builds healthy. Engineers save up to 5 hours a week and avoid frustration of broken builds. Our users include Slack, Bosch, Lightspeed, Square, Benchling, Figma and many others. For instance, Slack went from 180 master-build failures per quarter to just 1 build failure when they started using Aviator. Our goal is to become the leading brand for developer experience.
    developer-tools
    saas
    b2b
  • Marblism
    Marblism (w2024)Active • 2 employees
    Everyone dreads the first few lines of code: choosing frameworks, designing UI/UX, setting up your project, integrating front-end with back-end… That's why we created Marblism: just describe your app, and voila! Here’s how the magic work: 1. Describe the product you want to build: it works well for SaaS, marketplaces, social apps and AI apps 2. We generate the database and the back-end 3. We generate the front-end 4. You clone the github repos and you’re ready to go The 90% heavy lifting work is done for you. You focus on adding your 10% unique touch. You can launch your idea in days not months.
    artificial-intelligence
    developer-tools
    generative-ai
    ai-assistant
  • Talc
    Talc (s2023)Active • 2 employees • Seattle, WA, USA
    Talc makes it easy for companies to launch reliable AI apps faster. We provide a staging environment that runs through hundreds of realistic scenarios to give developers a clear picture of how well their AI is fulfilling business needs. We've spent the last 6 years launching ML systems to companies like Facebook and Airbnb. We're starting Talc because we know how big the gulf is between a good ML/AI system and one that a business can actually trust.
    artificial-intelligence
    developer-tools
  • Hyperpad
    Hyperpad (s2014)Active • 4 employees • London, ON, Canada
    Hypercard for iPad. Allows non-technical people to create media rich interactive apps like mobile games then publish them to the App store as native apps with out writing a single line of code.
    developer-tools
    education
    gaming
  • Mira
    Mira (s2023)Active • 3 employees • San Francisco, CA, USA
    Mira is an AI Agent designed for React based frontend teams. With Mira, teams can offload UI fixes, small features and technical debt.
    developer-tools
    generative-ai
    saas
    ai
  • Anarchy
    Anarchy (w2023)Active • 5 employees • Zürich, Switzerland
    Anarchy provides open-source LLM training infrastructure and tooling for developers. We provide a platform to help developers manage their datasets and fine-tunes.
    developer-tools
    generative-ai
    machine-learning
    infrastructure
    ai
  • Font Awesome
    Font Awesome (s2015)Active • 17 employees • Bentonville, AR, USA
    Add a line of code and get thousands of icons and social logos on your website instantly. Easy to set up, easy to use, and crazy powerful. Let us take care of the icons so you can get back to the important stuff. Font Awesome. Go make something Awesome.
    developer-tools
    saas
    design-tools
    open-source
  • SID
    SID (s2023)Active • 4 employees • San Francisco, CA, USA
    We make it easy for developers to connect customer data to their LLM apps. Instead of spending months on integrations and retrieval pipelines, Reworkd's AgentGPT added our button in an afternoon and let thousands of people connect their Notion, email and Drive instantly. Every single AI company is building data retrieval. Currently, they're doing this from scratch – we don't think they should have to. Just like OpenAI made working with LLMs as simple as an API call, SID makes it easy for every AI company to access data the same way.
    developer-tools
    generative-ai
    data-science
    ai
  • Parea
    Parea (s2023)Active • 2 employees • New York, NY, USA
    Parea AI is the essential developer platform for debugging and monitoring every stage of LLM application development. We provide testing, evaluation, and monitoring in one unified platform. These capabilities help developers get visibility into LLM responses, quickly test and optimize prompts, and ensure customers get the best user experience.
    developer-tools
    generative-ai
    saas
    devops
    monitoring
  • Rootly
    Rootly (s2021)Active • 35 employees • San Francisco, CA, USA
    At Rootly, we are a mission to be the go-to way companies respond when things go wrong, helping every organization be more reliable. We do this by building an industry leading incident management platform that allows companies around the world consistently and quickly resolve incidents. We are not simply transforming an industry, we are carving an entirely new +$B segment ourselves and need incredible talent to achieve this ambitious goal together. Customers love Rootly. Some of the fastest growing companies around the world such as NVIDIA, Figma, Canva, Tripadvisor, Squarespace and more rely on Rootly to power their critical incident management process. They obsess over our delightful enterprise-ready platform and unique partnership model.
    developer-tools
    saas
    b2b
  • SiLogy
    SiLogy (w2024)Active • 2 employees • New York, NY, USA
    We are building design verification tools on the cloud to help shorten go-to-market times for integrated circuits.
    developer-tools
    saas
    b2b
    semiconductors
  • Thunkable
    Thunkable (w2016)Active • 40 employees • San Francisco, CA, USA
    From MIT's App Inventor and YCombinator's W2016 batch, Thunkable allows anyone to build powerful native apps. With Thunkable, it's simple to design, and simple to code-- simply drag and drop to create fast, native, reliable apps. You don't need to download large development suites, command-line kits, or simulators. You can use the many built-in app templates as they are, or make changes. Make your changes online and see them on your device instantly with the Thunkable mobile app. Upload your apps directly to the Play Store or App Store or send them to friends!
    developer-tools
    saas
    design-tools
  • Vue Storefront
    Vue Storefront (w2021)Active • 100 employees • Warsaw, Poland
    Vue Storefront is a Frontend Platform (Head) for Headless commerce. Available as Open Source & Enterprise. By implementing Vue Storefront, you will improve your overall User Experience and lift up your revenues by at least 20%. 1. Lightning Fast We are on a mission to improve loading times for eCommerce users, especially on mobile devices. We want to make sure, that every site using Vue Storefront will load in under 2 seconds for all users across the globe. Currently, it is their weak spot: a) It takes, on average, 15.3 seconds to fully load a mobile page. b) 75% of mobile sites take longer than 10 seconds to load. c) 53% of mobile site visits are abandoned if it takes longer than 3 seconds to load. Loading times mean better User Experience and this leads to eCommerce users buying more, giving better conversion rates: a) Walmart found that for every 1-second improvement in page load time, conversions increased by 2% b) Increase of conversion % at each stage of the Customer Buying Journey at eCommerce based on 0.1s improvement based on Google Research (https://www.thinkwithgoogle.com/future-of marketing/creativity/mobile-page-speed-data/) 2. Fast Time To Value Vue Storefront is the glue for headless commerce, giving merchants the ability to connect with any eCommerce backend, any CMS, or any other 3rd party service, as we provide those APIs by default in our cloud platform. This is saving our clients thousands of development hours. Also, because of the Progressive Web App features that we provide, there is no need to build native iOS or Android apps - everything is available through the web. In combination with frontend components provided out of the box, it is possible to build a new eCommerce frontend within weeks, not months. 3. Fast content adjustments with any Headless CMS Headless CMS is the only way to embrace omnichannel sales, and we know it. That is why the Enterprise version of Vue Storefront delivers the API-first setup of integrations with the best Headless CMSes out-of-the-box. It allows business users to edit the content & publish with a no-code approach 4. Fast learning curve for developers We use the modern tech stack that is easily adaptable by the developer community, and what is better market proof than the popularity of our Open Source Project? We are currently the 5th most popular eCommerce framework globally and the 1st Frontend eCommerce Framework globally! https://docs.vuestorefront.io/v2/ https://www.vuestorefront.io/
    developer-tools
    open-source
    e-commerce
  • Tailor
    Tailor (s2022)Active • 16 employees • Tokyo, Japan
    Tailor is a backend platform that helps enterprises build their custom, enterprise grade ERP applications with less code. **Team** Yo and Misato have previously built a retail-tech company together and sold it for $20M to Rakuten. Yo is a three-time-acquired serial entrepreneur with a McKinsey background. Misato is a previous head of R&D at Mercari. Tailor is the first YC company fully based in Japan. **The Problem** In today's business world, old ERP systems just don't keep up. Their monolithic architecture makes it difficult for developers to tailor to the specific needs, even though that's what the enterprises want for ERP. At the same time, legacy ERPs struggle to work well with the variety of cloud-based tools that modern businesses rely on. Legacy, monolithic systems make it very difficult to customize and hard to integrate. Every time the company wants to change something, it becomes a huge project. Building on these challenges, users of old ERP systems often face: * Hard-to-Use Interfaces: The screens and menus are old school... confusing, slowing down your work. * Wrong Set of Features: Too many unnecessary options for you and not enough of what you actually need. * Lack of Transparency: It's tough to understand what's happening behind the scenes. * High Cost: The expense of maintaining these systems eats into your budget. **The Solution** Why Headless? - With our headless product, the frontend is easy to customize for clients - API-first approach makes it easy to connect with other existing systems or 3rd party services What does it mean to our clients? - Faster development - Reduced maintenance cost - Well-documented backend APIs Tailor’s key capabilities: - GraphQL endpoint for flexible frontend development - Customizable data model templates to describe complex business logic of large enterprises - Customizable workflows depending on the client's specific business process - Directory service that can reflect complex organizational structure (e.g. matrix organization) to the workflow
    developer-tools
    saas
    b2b
    api
    enterprise
  • FlutterFlow
    FlutterFlow (w2021)Active • 29 employees • San Mateo, CA, USA
    We're building a visual application development platform to dramatically improve the time to market and quality of digital experiences. FlutterFlow helps companies and product teams improve developer efficiency, accelerate project timelines, and reduce costs for large-scale business applications. Our customers include some of the largest banking, consulting, telecom, and manufacturing companies in the world. We have more than 600k users in more than 200 countries and regions around the world. We’re a remote first team, with a headquarters in the San Francisco Bay Area.
    developer-tools
    saas
    design-tools
  • Serra
    Serra (s2023)Active • 2 employees • San Francisco, CA, USA
    Serra is Tableau for data infrastructure. Serra enables smaller, less-technical teams to build cloud data infrastructure—batch and real-time data pipelines, rapid SQL analytics, and scalable data science and ML—through a user-friendly dashboard.
    developer-tools
    big-data
    data-engineering
    ai
  • Briefer
    Briefer (s2023)Active • 2 employees • São Paulo, State of São Paulo, Brazil
    Briefer helps data scientists and analysts build interactive visualizations and data apps using a Notion-like interface. Connect to your data sources, write SQL or Python, collaborate through comments and multiplayer editing, and run code in whichever compute environments you need.
    developer-tools
    b2b
    data-science
    data-engineering
    data-visualization
  • MindsDB
    MindsDB (w2020)Active • 24 employees • San Francisco, CA, USA
    MindsDB is a fast-growing open-source company that enables developers to quickly integrate Artificial Intelligence Logic into applications and ship AI-powered solutions from prototyping & experimentation to production in a fast & scalable way. MindsDB was founded in 2017 by Adam Carrigan (COO) and Jorge Torres (CEO) and based in San Francisco, California, is backed with over $50M in total funding from Mayfield, Benchmark, YCombinator, OpenOcean, Walden Catalyst Ventures, MMC, Speedinvest, TQ Ventures and the University of California Berkeley SkyDeck fund. MindsDB is also recognized by Forbes as one of America's most promising AI companies (2021) and by Gartner as a Cool Vendor for Data and AI (2022).
    developer-tools
    machine-learning
    open-source
  • Terminal
    Terminal (s2023)Active • 3 employees • Toronto, ON, Canada
    Terminal is Plaid for telematics data in commercial trucking. Companies building next generation insurance products, financial services and fleet software for trucking use our Universal API to access GPS data, speeding data and vehicle stats. Raghav (CEO) and Connor (CTO) led product and engineering at a series b-funded neobank where they spent 2.5 years integrating middleware APIs like Plaid & Stripe. Before that, Connor spent 3 years building software for his family-owned logistics company which was acquired by a private equity firm. Raghav’s family is in fleet operations and owns an HVAC company in San Francisco where they operate a fleet of 13 commercial vehicles.
    developer-tools
    logistics
    api
    supply-chain
    transportation
  • Corgea
    Corgea (s2023)Active • 4 employees • San Francisco, CA, USA
    Corgea helps companies fix vulnerable code quicker, and save 80% of the engineering cost & time in fixing these issues. It does this by using AI to write code fixes and issues pull-requests for your engineers to approve. You can see examples of real fixes here: demo.corgea.com. 
    developer-tools
    saas
    security
    cybersecurity
    ai
  • Repaint
    Repaint (s2023)Active • 2 employees • San Francisco, CA, USA
    Repaint is a website building tool made for designers. You click and drag elements on a canvas, and then deploy your creation with one click. Our goal is to make a tool that allows people to create fully-featured web apps without coding.
    developer-tools
    saas
    design
    design-tools
  • Telophase
    Telophase (s2023)Active • 2 employees • New York, NY, USA
    Top tech companies such as Uber, Samsara, Modern Treasury, Slack, and others partition their infrastructure to improve reliability and expand globally. The Telophase platform enables your company to do the same, in days not months.
    developer-tools
    b2b
    infrastructure
  • refine
    refine (s2023)Active • 10 employees • San Francisco, CA, USA
    refine is an open-source, headless React framework for rapidly building enterprise web applications. It eliminates many repetitive tasks like ➡️ CRUD operations ➡️ State management ➡️ Routing ➡️ Authentication ➡️ Access Control ➡️ i18n and saves days of development time. So far, thousands of great projects have been built by 15,000+ monthly active refine developers. Use cases are ranging from admin panels, dashboards, and internal tools to B2B solutions and complex SaaS interfaces. refine is backed by a strong community featuring 16K GitHub stars ⭐️, 180+ contributors and 2,500 Discord members. Thanks to it's unique "Headless UI" approach, refine works with any custom design. It has also ready-made integrations with 4 most popular UI frameworks: Ant Design, Material UI, Chakra UI and Mantine. refine is totally backend agnostic and it can connect to 15+ backend services out-of-the-box, incl. custom REST & GraphQL API's. With refine, developers always have 100% control over their projects as they build, style and deploy the way they like.
    developer-tools
    open-source
    web-development
  • GitStart
    GitStart (s2019)Active • 19 employees • San Francisco, CA, USA
    GitStart accelerates software engineers with Pull Requests as a Service. Assign tickets to GitStart Bot, go to sleep, and wake up with PRs. GitStart Bot automatically manages thousands of AI models and full-time engineers and runs peer reviews until PRs are ready to be merged. It’s scalable, flexible, and quality is guaranteed: you only pay for merged PRs.
    developer-tools
  • Pythagora (GPT Pilot)
    Pythagora (GPT Pilot) (w2024)Active • 6 employees • San Francisco, CA, USA
    Pythagora is an IDE extension that enables you to build production-ready web apps with natural language. You can just talk to Pythagora, and it will write all the code for your app. Pythagora is built on top of an AI open-source tool, GPT Pilot, that has more than 22k Github stars. It works by orchestrating a collection of AI agents that work together to build your app from start to finish while talking to you. You start by describing an app you want to build; then, it asks you questions about the details of the app to write the full app specifications. Once the specs are done, it starts coding. When it finishes a task, it asks you to test the app and tell it if something is incorrect. It iterates with you by changing the code and asking you for feedback until the task is finished. Finally, it commits the code it has written and proceeds to the next task until the entire app is finished.
    developer-tools
    open-source
    ai
  • OneSchema
    OneSchema (s2021)Active • 10 employees • San Francisco, CA, USA
    Product and engineering teams use OneSchema to save months of development time to build a CSV importer. OneSchema improves customer activation / import completion rates by automatically correcting customer data.
    developer-tools
    saas
    b2b
    data-engineering
  • Tiptap
    Tiptap (s2023)Active • 10 employees • Berlin, Germany
    Tiptap is a suite of open source content editing and real-time collaboration tools for developers building apps like Notion or Google Docs. It’s used by thousands of businesses worldwide, including GitLab, Axios, and Substack.
    developer-tools
    open-source
  • Artie
    Artie (s2023)Active • 4 employees • San Francisco, CA, USA
    Artie is software that streams data from databases to data warehouses in real-time. Today, most companies run their ETL process every few hours or overnight, so their data warehouse is always out of date; with Artie, the warehouse always has live production data.
    developer-tools
    saas
    open-source
    data-engineering
    enterprise-software
  • Unlayer
    Unlayer (w2022)Active • 35 employees • San Francisco, CA, USA
    Unlayer makes embeddable email and web editing software. We provide the essential editing tools that companies need to create successful marketing and engagement campaigns. If you want to add a rich email template editor, web page builder, or popup builder into your application, try Unlayer.
    developer-tools
    saas
    design-tools
  • Taiki
    Taiki (w2024)Active • 2 employees • The Paramount, 95 3rd St #2, San Francisco, CA 94103, USA
    “Plaid for tax documents”, an API that auto-extracts tax documents and data from payroll and financial providers. We pull files like W-2s, 1099s, 1098s, bank and brokerage monthly statements.
    developer-tools
    fintech
    api
    infrastructure
    ai
  • Onu
    Onu (w2023)Active • 1 employees • New York, NY, USA
    Onu is a developer-first tool that allows engineers to quickly turn their ops/CX-related scripts or workflows into production-ready internal tools without having to write any frontend code at all. - Spin up internal tools quickly using the scripts you’ve already written, spending zero time on frontend development. - See logs of each task’s previous executions to keep track of when it was run, who ran it, and the result - Run scripts in your own environment but without having to SSH into production - Use built-in integrations to easily add actions to your tasks like posting to Slack, sending an email, or generating a Linear issue
    developer-tools
    saas
    b2b
    operations
  • Encord
    Encord (w2021)Active • 70 employees • London, UK
    Encord is the leading data platform for advanced computer vision teams: Streamline labeling and RLHF workflows, observe and evaluate models, and manage & curate data to get to production AI faster. Encord's mission is to enable every company to harness the power of AI.
    artificial-intelligence
    developer-tools
    machine-learning
    computer-vision
    ai
  • Cosmic
    Cosmic (w2019)Active • 5 employees • San Francisco, CA, USA
    Cosmic is a headless CMS and API toolkit to help teams build modern apps faster, together. We provide a web dashboard to create content and API tools to deliver content into any website or app. Teams benefit from using Cosmic because it eliminates the need to build and maintain their own CMS infrastructure. Teams pay a monthly subscription fee for our hosted CMS and can focus on their application logic, creating great content, and enhancing user experiences.
    developer-tools
    api
  • Infisical
    Infisical (w2023)Active • 5 employees • San Francisco, CA, USA
    Infisical is an open-source platform to manage secrets and configs across your team and infrastructure. Infisical stores your secrets and injects them back into your development workflow, CI/CD pipelines, and cloud infrastructure. It comes with secrets versioning, point-in-time recovery, audit logging, automatic secret rotation capabilities, and more.
    developer-tools
    saas
    b2b
    security
    open-source
  • Fume
    Fume (w2024)Active • 2 employees • San Francisco, CA, USA
    We are building the AI agent to 10x your efficiency in software development. Often times, PRs get stuck in a never-ending cycle of feedback and iteration. They even take days to merge. With Fume, when you tag '@FumeDev' in your code review, our agent picks up your feedback and applies everything perfectly in 5 minutes. Meaning, you can ship code much faster without sacrificing quality.
    artificial-intelligence
    developer-tools
    b2b
  • renderlet
    renderlet (w2024)Active • 1 employees • Broad St, New York, NY, USA
    renderlet is a framework that enables developers to write 2D and 3D rendering code once and run it anywhere. Building graphically intensive applications is very hard – existing tools are cumbersome and aren’t truly platform agnostic, leading to frequent rework. With renderlet, a fully portable rendering pipeline is embedded in your app using WebAssembly, enabling graphics to safely and automatically run on any platform’s GPU. Never (re)write another line of raw OpenGL code again.
    developer-tools
    design-tools
    data-visualization
  • mutable.ai
    mutable.ai (w2022)Active • 7 employees • CA-1, San Francisco, CA, USA
    Mutable.ai is automating corporations starting by automating software and software understanding. Our product auto wiki (https://wiki.mutable.ai/kubernetes/kubernetes, https://twitter.com/mutableai/status/1744426997575553413) turns code into wikipedia style articles with citations to the code is the best way to understand complex technologies
    developer-tools
    productivity
    ai
  • Replicate
    Replicate (w2020)Active • 27 employees • San Francisco, CA, USA
    artificial-intelligence
    developer-tools
    machine-learning
    community
    open-source
  • Metalware
    Metalware (s2023)Active • 2 employees • San Francisco, CA, USA
    Isocode is building copilot for the 1.5 million firmware engineers worldwide. We help hardware companies launch embedded systems 10x faster by automating low-level programming.
    artificial-intelligence
    developer-tools
    hardware
    enterprise-software
    semiconductors
  • Blacksmith
    Blacksmith (w2024)Active • 3 employees • 17 Roscoe St, San Francisco, CA 94110, USA
    Blacksmith helps companies run their continuous integration (CI) up to twice as fast, at half the cost. We do this by running their CI on high performance gaming CPUs. - Engineering productivity is often marred by slow CI that grows quadratically with the size of the engineering organization. - On top of this, companies pay high markups to run CI on the hyperscalers. - Consequently, companies have to run their CI on spot instances to keep costs in check. Since spot instances can get pre-empted at any point, running CI reliably on them requires [significant engineering investment](https://www.rippling.com/blog/how-rippling-used-spot-instances-to-save-and-scale-ci-cd). Blacksmith offers CI compute that is more performant, cheaper, and reliable. With Blacksmith, companies do not have to think about CI as they scale. We are starting with GitHub Actions - today's most popular and fastest-growing CI system. With a one-line change, companies can run their CI up to twice as fast on our high-performance hardware. In addition to this, Blacksmith provides colocated warm caches along with optimizations for common CI workloads (like building and pushing Docker images). Aayush, JP and Aditya have gained deep systems and product knowledge from their time at Cockroach Labs and Faire respectively. Both these companies, with several hundred engineers, were spending in the order of millions of dollars on their CI. Yet they were riddled with slow CI and actively seeking out cheaper and faster alternatives. Blacksmith offers exactly this alternative, at a time where being lean is table-stakes for most companies.
    developer-tools
    b2b
    devops
    cloud-computing
    infrastructure
  • Reflex
    Reflex (w2023)Active • 7 employees • San Francisco, CA, USA
    Reflex is an open-source, full-stack python framework that makes it easy to build and deploy web apps in minutes. It offers the ease of use and accessibility of low-code frameworks, combined with the flexibility, performance, and customizability of traditional web development. Reflex is open-source and designed to be easy to get started with for those with no previous web development experience. With Reflex, data scientists and software engineers can create high-quality web applications quickly and easily without needing to learn specific web development technologies. Whether you want to build a small-scale data science project/internal app, or a large-scale multi-page web app, Reflex has the tools and features to handle any project. The framework is optimized for performance, scalability, and SEO, so you can focus on creating a beautiful and engaging web app that you can be proud of.
    developer-tools
    open-source
    web-development
    infrastructure
  • Traceloop
    Traceloop (w2023)Active • 5 employees • Tel Aviv-Yafo, Israel
    Traceloop monitors the quality of your LLM application in production. It provides you with alerts, insights and gradual rollout capabilities to confidently deploy changes to your prompts and model configurations.
    developer-tools
    generative-ai
    saas
    open-source
  • Trigger.dev
    Trigger.dev (w2023)Active • 4 employees • London, UK
    Create background jobs directly in your codebase with features like API integrations, webhooks, scheduling and delays. Previously, the founders built JSON Hero, an open source JSON viewer that is currently used by more than 35k developers a month. Eric was CTO of Code School, an early code learning platform that was acquired in 2015. Matt created two iPad apps that won Apple’s App of the Year.
    developer-tools
    saas
    b2b
    productivity
    open-source
  • authzed
    authzed (w2021)Active • 12 employees • New York, NY, USA
    We build the tools companies need to provide performant and scalable authorization for their applications. We’re founded by 3 successful entrepreneurs with expertise in enterprise software, most recently as leaders at Red Hat. Jake and Joey met on the APIs team at Google in 2010. They went on to found Quay, where Jimmy joined as their first hire. Over the past decade, they’ve changed the landscape for building and deploying software.
    developer-tools
    saas
    security
    open-source
    data-engineering
  • OpenReplay
    OpenReplay (s2019)Active • 11 employees • Paris, France
    Open-source alternative to FullStory and LogRocket. Self-hosted for a complete control over your data and costs.
    developer-tools
    saas
    open-source
  • SnapTrade
    SnapTrade (w2022)Active • 17 employees • Fredericton, NB, Canada
    SnapTrade is an API to connect retail brokerage accounts to any fintech app. We enable API access to real-time account data, historical transactions, and trading. This makes it possible to build new investing experiences with existing brokerage accounts, so users don't need to transfer and it's easier to get started.
    developer-tools
    fintech
    b2b
    api
  • Haven
    Haven (s2023)Active • 2 employees • Berlin, Germany
    Haven enables companies to fine-tune and deploy open source LLMs with a single API call. Our customers use Haven to personalize models on their data and securely run them on-premise or in the cloud.
    artificial-intelligence
    developer-tools
    infrastructure
  • Doctor Droid
    Doctor Droid (w2023)Active • 6 employees • San Francisco, CA, USA
    Doctor Droid is an automated diagnosis and troubleshooting assistant for engineering teams. Doctor Droid integrates with your existing monitoring stack (10+ tools supported) and assists with automated diagnosis, troubleshooting recommendations and more. To get an automated report on the state of alerting & noise in your company, try out our free report generator today -- https://drdroid.io/
    developer-tools
    saas
    b2b
  • ReadMe
    ReadMe (w2015)Active • 52 employees • San Francisco, CA, USA
    ReadMe provides every company the ability to easily create beautiful documentation, and build loyal, productive developer communities. With ReadMe, build developer portals that combine support, tutorials, topical guides and API exploration. ReadMe makes it trivial to keep docs up-to-date and has community oriented features that help drive adoption. Wanna see what it'd look like to work at ReadMe? Our careers page takes a stab at it! https://readme.com/careers
    developer-tools
    design-tools
  • Mobot
    Mobot (w2019)Active • 40 employees • New York, NY, USA
    Mobot (YC W19) is a QA-as-a-service platform using actual mechanical robots to automate testing of repetitive functions on real mobile devices. Mobot's human-supervised robots make it possible to automate mobile app tests that emulators, virtual devices, and existing frameworks can't. This approach eliminates thousands of hours of manual testing, increases testing efficiency and physical device coverage, and captures more bugs in-app before app store launches than software can do alone.
    developer-tools
    hardware
    b2b
  • Million.js
    Million.js (w2024)Active • 3 employees • San Francisco, CA, USA
    Million.js is an open source tool that makes React.js 70% faster. We want to make Million a web embed that allows developers to select and ask why parts of a page are slow and automatically generate a GitHub pull request with a fix using AI. Today, most developers spend weeks trying to comprehend flame graphs and execution traces, debug with frustration, and give up. We realized that web developers don’t want to put the grimy work to make their app performant. Instead, we fix performance issues automatically, with no migration. Our end goal is to make all applications automatically fast, starting from frontend to backend, and eventually mobile apps & infrastructure.
    developer-tools
    open-source
    web-development
    ai-assistant
    ml
  • Magic Patterns
    Magic Patterns (w2023)Active • 2 employees • San Francisco, CA, USA
    Get design inspiration and generate production-ready frontend code from a text prompt, image, or Figma mockup. Engineers and designers at large and small companies use Magic Patterns to speed up time to launch. We support generating UI from your company's existing design system. Feel free to reach out: info@magicpatterns.com
    developer-tools
    generative-ai
    design-tools
    ai
    ai-assistant