Developer Tools Startups funded by Y Combinator (YC) in San Francisco 2024

May 2024

Browse 100 of the top Developer Tools startups funded by Y Combinator. Headquartered in San Francisco, these are some of the hottest and fastest-growing startups.

We also have a Startup Directory where you can search through over 5,000 companies.

  • 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
  • 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
  • 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 • 80 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
  • 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
  • Retool
    Retool (w2017)Active • 300 employees • San Francisco, CA, USA
    Retool is the fast way to build internal tools.
    developer-tools
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • Replicate
    Replicate (w2020)Active • 27 employees • San Francisco, CA, USA
    artificial-intelligence
    developer-tools
    machine-learning
    community
    open-source
  • 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
  • Ultralight
    Ultralight (w2019)Active • San Francisco, CA, USA
    Effortlessly display modern web-content everywhere. Think of Java, but for web-content and JavaScript. Available for desktop apps, game consoles, embedded device displays, servers, and more.
    developer-tools
    hard-tech
    b2b
    gaming
    api
  • 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
  • Courier
    Courier (s2019)Active • 35 employees • San Francisco, CA, USA
    Courier is the fastest way for developers to build notifications for their app. Our APIs take the tedium out of integrating various notification channels, while our visual designer lets anyone design a message template and deliver their notifications to the best channel for each user with a single API call. Email, Push, In-App, Slack, SMS, you name it. Think "Stripe, for notifications."
    developer-tools
    messaging
  • Datasaur
    Datasaur (w2020)Active • 55 employees • Livermore, CA, USA
    Datasaur builds intelligent, optimized, human-centric LLM/NLP tools. If you're still using Excel or maintaining your own in-house tools, Datasaur can offer you significant cost-savings and improve the quality of your training data. We provide tools custom-built for power users. Our built-in intelligence helps augment your human labelers and avoid costly mistakes; our workforce management tool allows you to assign projects to and cross-validate the results from multiple labelers to ensure you can train your models with the utmost confidence. I have 10 years of consumer product experience. I'd be happy to help discuss product strategy and gamification. I'd love to get any advice you have to offer on SaaS and enterprise sales.
    artificial-intelligence
    deep-learning
    developer-tools
  • Duckly
    Duckly (s2020)Active • 5 employees • San Francisco, CA, USA
    Duckly enables teams to talk and collaborate in real-time. Teams can use a simple URL that is easy to join and remember. You can share a website and allow your colleagues to click, type, and browse with you. You can share your code directly from your IDE or even share a terminal session that your team can interact with. All with high-quality audio and video chat. We are building tools for real-time remote collaboration that makes it easy for teams to work as if they were side by side and share what they know.
    developer-tools
    b2b
    team-collaboration
  • Velt
    Velt (w2022)Active • 10 employees • San Francisco, CA, USA
    Our mission is to make the web more collaborative. We're not just making collaboration faster—we're crafting it to be the best. Today we’re all using online platforms more than ever before - building, researching, learning, connecting etc. And we're not doing it alone. We're doing it together with other people and machines, turning the internet into the world's biggest team. Yet, the web was built for solo voyages. We saw a shift when platforms like Figma and Google Docs brought a multiplayer approach, breaking down walls and inspiring seamless teamwork. At Velt, we're taking it further. We're on a mission to infuse the magic of collaboration into the fabric of the web—one app at a time. We aim to erase the lines between online and offline co-working, crafting an environment where distance is irrelevant, and 'flow' is the norm. Right now, more than half of work hours are spent on coordination and communication—less on creating. With Velt, we're setting out to reverse these figures, reducing time spent on logistical issues by over 90%. Imagine what we can create when we spend less time talking about work and more time doing it! We're building a better web—a web for us, for our team, for everyone. Join us, and let's accelerate the future of web together 🚀 Our Products: - Velt Collaboration SDK (https://velt.dev/): JS SDK to add powerful collaboration experiences to your own product for your end-users. This helps you ship such experiences ridiculously fast, increase user growth and engagement. - Superflow (https://usesuperflow.com/): JS plugin to enable product, marketing and design teams to comment and collaborate directly on their websites. This helps them iterate and ship their products 10x faster. We’re a team of ex-Googlers. We've launched products like Augmented Reality in Google Search & Maps. Come build a better web with us 🚀
    developer-tools
    saas
    collaboration
    api
    remote-work
  • Ditto
    Ditto (w2020)Active • 9 employees • San Francisco, CA, USA
    Manage the words across your team’s product from design to production.
    developer-tools
    saas
    design-tools
  • Expo
    Expo (s2016)Active • 23 employees • Palo Alto, CA, USA
    Expo lets developers write apps that are written in JavaScript and run natively on Android, iOS, and the web. Our cloud services that work with all Expo and React Native apps, named Expo Application Services (EAS), further speeds up teams by helping them get to the app stores as fast as possible and continue growing. We believe that mobile apps provide a better experience than websites, but making apps is much more difficult than it needs to be. With Expo, we're bringing together the best of the web, like its development speed, fast iteration cycles, easy deploys, and automatic cross-platform support, and the performance, device capabilities, and user experience of native apps.
    developer-tools
  • Tint
    Tint (w2021)Active • 40 employees • San Francisco, CA, USA
    Tint makes it easy for tech platforms to embed insurance into their products. For example, when you go to Outdoorsy to rent an RV, the insurance that is sold with the rental is powered by our technology. Our product provides anything that is needed from underwriting software to access to insurers to compliance, in a simple API.
    artificial-intelligence
    developer-tools
    fintech
  • Tumult
    Tumult (w2011)Active • 1 employees • San Francisco, CA, USA
    Tumult Inc. makes the next generation of designer tools to produce beautiful web content.
    developer-tools
    design-tools
  • 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
  • Castle
    Castle (w2016)Active • 20 employees • San Francisco, CA, USA
    Instantly stop automated and human-originated account takeovers, fake accounts, and any behavior that violates your platform policies.
    developer-tools
    saas
    security
    fraud-detection
  • Mintlify
    Mintlify (w2022)Active • 8 employees • San Francisco, CA, USA
    The best developer companies (think Stripe, Twilio, MongoDB) have effective and user-centric documentation at their backbone. Mintlify helps any company achieve the documentation they need effortlessly, so that they can focus on building what they do best.
    developer-tools
  • zeroheight
    zeroheight (s2019)Active • 75 employees • London, UK
    UX teams are scaling exponentially, but in order to scale effectively, they need to be able to reuse each other’s work. The problem is that right now, UX designers and developers don’t know what’s been done before and they end up rebuilding the same things – over and over. zeroheight integrates with UX tools and allows teams to document their work, so that it can be reused and they can deliver UX faster.
    developer-tools
    saas
    design-tools
  • Signadot
    Signadot (w2020)Active • 8 employees • San Mateo, CA, USA
    Signadot is a Kubernetes-native platform that accelerates the development of microservices based applications. Using Signadot developers test and preview their code changes early in the development lifecycle and iterate 10x faster.
    developer-tools
    kubernetes
  • DeepSource
    DeepSource (w2020)Active • 11 employees • San Francisco, CA, USA
    DeepSource continuously analyzes source code changes to find and fix issues categorized as security, performance, anti-patterns, and bug-risks. DeepSource integrates with GitHub, GitLab, Bitbucket, and Azure DevOps and runs analysis on every commit and pull request, discovers and fixes potential issues before they make it to production.
    developer-tools
    saas
    ai
    ai-assistant
  • Outerbase
    Outerbase (w2023)Active • 4 employees • Pittsburgh, PA, USA
    Outerbase is the interface for your database. Companies use Outerbase to view, edit, and modify their data and even generate beautiful visual dashboards without having to write a single line of SQL.
    developer-tools
    generative-ai
    analytics
    data-engineering
    ai
  • Mindee
    Mindee (w2021)Active • 60 employees • Paris, France
    Documents are everywhere. Through all industries, understanding their content is a critical step of many processes that software builders throughout the globe want to automate. We focus on the science, the AI, the deep learning to give these builders the one API they need to automate the understanding of documents and give their software human-like superpowers. Based on three pillars: - A product: a universal self-service platform where builders can train their own models - A catalog of use-cases: We push critical use cases to the limits of human performances in critical markets such as Accounting software, AP Automation, Expense Management, KYC and many others - A internal capability to make tailor-made AI: We answer to specific needs from large customers that needs a custom AI of their own to handle their use cases
    artificial-intelligence
    deep-learning
    developer-tools
    automation
    apis
  • Noya Software
    Noya Software (w2023)Active • 2 employees • San Francisco, CA, USA
    Noya is a new kind of product design tool for non-designers. This is our second time co-founding a design tools company – our first company was acquired by Airbnb in 2017 and we became the design tools team there. At Airbnb, we built the design infrastructure that the entire company relied on to scale design without increasing headcount costs. We did this by letting non-designers (such as marketing, PMs, and engineering) design screens and websites. Now we're making these tools available to every company.
    developer-tools
    saas
    b2b
    design-tools
    open-source
  • Rulebricks
    Rulebricks (w2021)Active • 2 employees • Los Altos, CA, USA
    Many workflow builders and automation tools have support for adding logic to your processes, but get complicated quick– to the point where process owners are unable to edit them directly and require specialist services. Rulebricks separates decision-making logic from your workflows, giving your team a clear visual, spreadsheet-like interface to manage the changing rules that drive your business, and use those rules as API endpoints, visual forms, and in automation tools like Zapier.
    developer-tools
    saas
    b2b
    workflow-automation
    enterprise-software
  • Ollama
    Ollama (w2021)Active • Palo Alto, CA, USA
    artificial-intelligence
    developer-tools
    open-source
  • Openlayer
    Openlayer (s2021)Active • 6 employees • San Francisco, CA, USA
    Track prompts and models. Test edge cases. Catch errors in production. Evaluate your AI with one-line of code.
    aiops
    developer-tools
    generative-ai
    machine-learning
    ai
  • Pipekit
    Pipekit (s2021)Active • 7 employees • San Francisco, CA, USA
    Our app manages Argo Workflows for data teams, enabling complex data & CI pipelines in half the time while saving companies hundreds of thousands of dollars annually. Argo Workflows is an open-source pipeline framework for Kubernetes that’s used in production by Bloomberg, Intuit, Adobe, New Relic, NVIDIA, and many other open-source early adopters.
    developer-tools
    open-source
    data-engineering
    devops
  • Cloudthread
    Cloudthread (s2021)Active • 8 employees • San Francisco, CA, USA
    Cloudthread is an analytics platform that helps engineering teams build cost efficiently in the cloud. We were behind Lyft's internal cloud cost management system and now we use that deep expertise to help organizations save hours of engineering time, reduce cloud bills, and prevent costly re-architectures.
    developer-tools
    finops
    b2b
    workflow-automation
    cloud-computing
  • Warrant
    Warrant (s2021)Active • 3 employees • Los Angeles, CA, USA
    Warrant is an open source authorization service that helps developers implement and enforce access control in their applications. Warrant serves as a dedicated, centralized platform for handling user authorization and access control so engineering teams can focus on building their core products.
    developer-tools
    b2b
    open-source
    api
  • Stably
    Stably (w2022)Active • 2 employees • San Francisco, CA, USA
    Stably helps engineering teams develop fast without breaking things. We do so by using AI to generate, run, and maintain your E2E tests automatically.
    artificial-intelligence
    developer-tools
    saas
  • Hydra
    Hydra (w2022)Active • 6 employees • San Francisco, CA, USA
    Open source Snowflake alternative. Query billions of rows instantly on column-oriented Postgres. Hydra can be used as open source, managed cloud, or deployable in customer cloud infrastructure. Get parallelized analytics in minutes with no code changes
    developer-tools
    analytics
    open-source
    data-engineering
  • Convore
    Convore (w2022)Active • 4 employees • San Francisco, CA, USA
    Universal conversation API for developers
    artificial-intelligence
    developer-tools
    saas
    api
    email
  • Medplum
    Medplum (s2022)Active • 3 employees • San Francisco, CA, USA
    Medplum makes it easy to build healthcare webapps that are compliant and interoperability ready. Our open source toolkit allows healthcare providers write apps that are HIPAA compliant, SOC2 certified and FHIR native - streamlining payor connections, health system integrations and more.
    developer-tools
    open-source
    healthcare
  • Airtrain AI
    Airtrain AI (s2022)Active • 5 employees • San Francisco, CA, USA
    Airtrain AI is a no-code compute platform for Large Language Models. Proprietary AI models such as GPT-4 are very powerful but also very costly, slow, unreliable, and unsecured. As businesses look to scale their AI prototypes into production-grade products, they struggle with large AI bills, slow APIs and large failure rates. On the other hand, smaller language models have been proven to be able to perform on-part with large ones with fine-tuned on high-quality datasets. Airtrain AI lets AI practitioners explore alternatives to proprietary models, build up training datasets, evaluate, fine-tune, and serve a large selection of open-source LLMs.
    aiops
    artificial-intelligence
    developer-tools
    saas
    cloud-computing
  • Metriport
    Metriport (s2022)Active • 7 employees • San Francisco, CA, USA
    Metriport helps healthcare organizations access and manage comprehensive patient medical data. Through a single integration, Metriport ensures clinical accuracy and completeness of medical information to providers, delivering comprehensive consolidated patient clinical data at the point-of-care. By standardizing, de-duplicating, consolidating, and hydrating the data with medical code crosswalking, providers get a rich understanding of their patients' medical histories through Metriport. Metriport is the only open-source solution of its kind that offers all these integrations in a single platform, and standardizes complex data formats into industry standards such as FHIR and C-CDA. As a developer-first, HIPAA and SOC 2 Type II compliant interoperability solution, Metriport is powering the next wave of innovators in healthcare, creating an internet for healthcare data.
    developer-tools
    b2b
    digital-health
    healthcare
    api
  • Taro
    Taro (s2022)Active • 3 employees • Redwood City, CA, USA
    Taro members get access to insider advice on how to get promoted at their company, detailed data on compensation, and invitations to exclusive networking events. Taro focuses on the non-coding parts of the job, with courses + Q&A from leads at top tech companies, organized by level + company. The result is faster career growth for software engineers: improved onboarding, promotion, and pay increases. Sample topics include how to optimize performance review, effective code review, and faster onboarding. These are the skills essential for career growth that don't get taught in schools or bootcamps.
    developer-tools
    education
    community
    video
    creator-economy
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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 $65M in funding from top investors including Accel, Insight Partners, Y Combinator, John/Patrick Collison, Daniel Gross, and Nat Friedman.
    artificial-intelligence
    deep-learning
    developer-tools
  • Rutter
    Rutter (s2019)Active • 24 employees • San Francisco, CA, USA
    Rutter is building a universal API for e-commerce platforms, accounting systems and payment processors. Similar to the financial market before Plaid, the world of business financial data is split across hundreds of platforms like e-commerce storefronts, marketplaces, accounting systems and payment processors, such as Shopify, Amazon, Quickbooks, Netsuite, Stripe and others. Each of these platforms has its own app store or its equivalent, and the enterprising developer must spend thousands of hours building integrations in order to access the entire market. Rutter is an integration layer for any company building integrations into commerce or accounting platforms. You can learn more about our universal API here: https://www.rutter.com/
    developer-tools
    fintech
    b2b
  • Rootly
    Rootly (s2021)Active • 52 employees • San Francisco, CA, USA
    At Rootly, we are a mission to be the go-to way companies respond when things go wrong, helping every organization be more reliable. We do this by building an industry leading incident management platform that allows companies around the world consistently and quickly resolve incidents. We are not simply transforming an industry, we are carving an entirely new +$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
  • 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
  • FlutterFlow
    FlutterFlow (w2021)Active • 50 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 1.3M users in more than 200 countries and regions around the world. We’re a remote first team headquartered in the San Francisco Bay Area. We have offices in Mountain View, New York City, and Singapore.
    developer-tools
    saas
    design-tools
  • 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
  • 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
  • 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
  • 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
  • SuperTokens
    SuperTokens (s2020)Active • 10 employees • San Francisco, CA, USA
    SuperTokens is building open source authentication (as an alternative to Auth0, Firebase and AWS Cognito). Add secure, hassle free authentication to your app in 1 day. We enable startups to launch quicker and focus on their core product offering 1. We're easier to implement as we take a modular approach - making it possible to pick only the features you need for your use case. This means you need not worry about complications associated with other features (eg: SSO and OAuth if you don’t need it) and this in turn makes it easier to implement and manage SuperTokens. 2. Developer's can own and manage their user's data. 3. SuperTokens can be run on your premise for free and also has a generous hosted tier for those who dont want to manage it themselves. SuperTokens is being used by hundreds of developers across the globe.
    developer-tools
    saas
    b2b
    open-source
  • testRigor
    testRigor (s2021)Active • 25 employees • San Francisco, CA, USA
    testRigor is an executable specifications engine to help companies to empower their manual QA to be able to build automation 15X than QA engineers and spend 200X less time maintaining the code.
    developer-tools
    saas
  • Freshpaint
    Freshpaint (s2019)Active • 45 employees • San Francisco, CA, USA
    Our customers use Freshpaint to make their websites and entire marketing stack HIPAA compliant. It's impossible to use modern analytics and marketing tools without sharing sensitive HIPAA-regulated data. Our platform does the hard thing of moving data from A to B. And then we do the really hard thing of controlling the flow of sensitive HIPAA-regulated data to various 3rd-party marketing tools. We're building the data infrastructure that safeguards patient privacy while also enabling marketing teams promote access to healthcare.
    developer-tools
    saas
    b2b
  • Lightdash
    Lightdash (s2020)Active • 9 employees • London, UK
    Lightdash is an open-source Looker alternative. It's built on top of dbt and lets users centralise all their team's business logic in one place.
    developer-tools
    b2b
    analytics
    open-source
    data-visualization
  • Aquarium Learning
    Aquarium Learning (s2020)Active • 12 employees • San Francisco, CA, USA
    ML models are only as good as the datasets they're trained on, and that means that most improvement to model performance comes from improvement to the quality and diversity of their datasets. Our tooling makes it easy for ML teams to find anomalies + failure patterns in their datasets and fix these problems by editing / adding the right data. So the next time you retrain your model, it just gets better.
    deep-learning
    developer-tools
    generative-ai
    machine-learning
    ai
  • Escape
    Escape (w2023)Active • 6 employees • Paris, France
    Find and fix business logic vulnerabilities in your applications in CI/CD before production — powered by Escape’s industry-leading API security intelligence.
    developer-tools
    security
    api
    graphql
  • Seam
    Seam (s2020)Active • 25 employees • San Francisco, CA, USA
    Seam lets developers connect and control 3rd-party connected devices like door locks, thermostats, and more.
    developer-tools
    iot
    api
  • Safepay
    Safepay (s2020)Active • 4 employees • San Francisco, CA, USA
    Safepay provides a single integrated payments solution that interoperates with local and international payment options. Our current focus is to serve businesses and individuals in Pakistan and neighboring economies.
    developer-tools
    fintech
  • Rosebud AI
    Rosebud AI (s2019)Active • 10 employees • San Francisco, CA, USA
    Rosebud is building the AI Roblox. We will make it 1000X easier for a community of game devs to create and enjoy the games of their dreams. ‍ We’re a team of PhD researchers, creatives and engineers building the generative AI platform to enable game creation at the speed of thought. We believe all media creation will be done via generative methods in a few years. We're building that future.
    artificial-intelligence
    developer-tools
    generative-ai
    machine-learning
    gaming
  • Rainforest
    Rainforest (s2012)Active • 40 employees • San Francisco, CA, USA
    No-code platform for end-to-end, automated software testing that integrates with any CI/CD pipeline. Improve quality and move faster without a QA team. We have a sweet YC deal.
    developer-tools
    saas
  • ZeFi
    ZeFi (w2020)Active • 5 employees • San Francisco, CA, USA
    ZeFi is a zk native cloud platform that lets developers build and deploy zero knowledge circuits directly on the cloud. With one click deployment and instant provisioning of APIs for proof generation, you can go to to market with your zk circuits instantly.
    developer-tools
    crypto-web3
  • FlowDeploy
    FlowDeploy (w2022)Active • 3 employees • Mountain View, CA, USA
    FlowDeploy helps bioinformaticians manage their data analysis pipelines. We provide everything they need to try, run, develop, and share their pipelines. That includes integrations with AWS, Snakemake, Nextflow, GitHub, Slack, SSO, and more, as well as a clean API and web app for launching and monitoring pipelines and managing their data. FlowDeploy is built for bioinformaticians: it doesn't restrict how pipelines are built and managed, as long as a bioinformatics workflow manager like Nextflow or Snakemake is used. But it does eliminate several footguns like idle spend and accidental data egress, and it reduces the potential for users accidentally sharing credentials. FlowDeploy runs the pipelines in either our managed cloud or the customer's cloud – eliminating the need to transfer data externally. Non-computational biologists can use FlowDeploy, too: features like pipelines templates decrease the complexity to launch a new pipeline, which reduces user error and decreases the need for advanced cloud training for non-computational users.
    developer-tools
    drug-discovery
    data-engineering
  • 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
  • DreamCraft Entertainment, Inc.
    DreamCraft Entertainment, Inc. (s2018)Active • 23 employees • Redwood City, CA, USA
    DreamCraft enables anyone to create, publish, and monetize video games. The company’s core product is a code-free game creation platform, bundled with high quality art assets. DreamCraft is backed by March Capital, Makers Fund, Tencent Corporation, Y Combinator, and other top investors in the gaming space. The company was founded in 2018 and now has a global team of 20+ people with half remote and half based in Silicon Valley.
    developer-tools
    entertainment
    gaming
  • Cortex
    Cortex (w2020)Active • 50 employees • San Francisco, CA, USA
    ​​Cortex is an internal developer portal built to accelerate the path to engineering excellence. Companies like Docker, TripAdvisor, and Dropbox use Cortex to catalog, score, and assign action to improve service quality and velocity, so devs can get back to work that drives the business forward.
    developer-tools
    saas
    b2b
  • Index
    Index (s2019)Active • 4 employees • San Francisco, CA, USA
    Index is a dashboard builder for your business metrics. It's super fast, polished and collaborative.
    developer-tools
    saas
    b2b
    analytics
  • Logarithm Labs
    Logarithm Labs (w2020)Active • 2 employees • Foster City, CA, USA
    Easy button to use data for your daily operations. Power your business workflows with quality data. Logarithm Labs helps you turn manual data wrangling and ad-hoc scripts into repeatable pipelines for your operational workflows. Power your workflows with quality data. Our product and team of experts do the heavy lifting so that can focus on the business logic that drives your organization. To learn more, contact us at hello@logarithmlabs.com.
    developer-tools
    data-engineering
  • Dropbase
    Dropbase (w2020)Active • 5 employees • San Francisco, CA, USA
    Dropbase is a developer platform to build backend operations software and internal tools using AI, fast and painlessly. It eliminates the frustrations, learning curves, and lack of flexibility of traditional low-code/no-code tools. Dropbase works well with standard development and CI/CD workflows — apps are just files, so every component and logic you add generates code you can review and commit.
    artificial-intelligence
    developer-tools
    saas
    b2b
  • Jet Admin
    Jet Admin (w2020)Active • 8 employees • San Francisco, CA, USA
    Jet Admin - an app builder designed specifically for creating internal tools, admin panels, external portals, inventory apps, and other business applications really fast and without coding. In Jet Admin, you can assemble multi-page apps with complex user flows, connected to multiple data sources. Setting up custom layouts, adding custom actions and workflows, binding and transforming dynamic values, using conditional rules and validations - all is done through a drag & drop and point & click visual builder. We’ve also added a variety of developer tools, so whenever necessary, you can create custom SQL and HTTP queries, write JavaScript, create multiple environments, code, and embed custom UI components.
    developer-tools
    saas
    b2b
  • ShortLoop
    ShortLoop (w2023)Active • 3 employees • Bengaluru, Karnataka, India
    We create up-to-date API collections, identify dependencies, breaking changes and API behavior without manual effort.
    developer-tools
    saas
    b2b
    api
  • Svix
    Svix (w2021)Active • 10 employees • New York, NY, USA
    Svix is the enterprise ready and open source webhooks service. Webhooks are a pain. Developers need to worry about deliverability, retries, monitoring and security. All of which are different for webhooks compared to the rest of the stack. We turn all of that into a simple API call. Svix is sending billions of webhooks for customers both large (Fortune 50) and small (startups), and is backed by Y Combinator, Andreessen Horowitz (a16z), Aleph, and founders and CTOs of companies such as Github, PagerDuty, Segment and Lookout.
    developer-tools
    open-source
    api
  • Wasmer
    Wasmer (s2019)Active • 11 employees • San Francisco, CA, USA
    We are working on the software that will power the next generation of Cloud Computing (Edge Computing) platforms using WebAssembly. You can see us as a mix between Docker (but 100x more performant in startup time, and with 100x more lightweight containers), npm (we released the first WebAssembly package manager: wapm.io) and the JVM (but more universal).
    developer-tools
    open-source
  • highlight.io
    highlight.io (w2023)Active • 8 employees • Irvine, CA, USA
    highlight.io is the open source, full-stack monitoring platform. With just a few lines of code, Highlight makes it easy to understand what's slowing down your users and swiftly address errors and regressions on your web app. Imagine that you have a customer reporting an issue on your web app. With highlight.io, you can playback their exact interactions to reproduce the bug and get notified of any future errors that could happen. That being said, we’re just getting started! We have plans to go way deeper into your observability stack to give you all of the visibility you need. Join us on this journey: - Star us on GitHub (https://github.com/highlight/highlight) to keep up with releases and news. - Join our Discord (https://highlight.io/community) to share product feedback and thoughts.
    developer-tools
    saas
    b2b
    open-source
    monitoring
  • Pierre
    Pierre (w2023)Active • 2 employees • New York, NY, USA
    Pierre enables engineers, designers and business team members to discuss new features before they're merged.
    ai-enhanced-learning
    developer-tools
    b2b
    productivity
    collaboration
  • Jovian
    Jovian (s2021)Active • 6 employees • Bengaluru, Karnataka, India
    Jovian is an online university for software development and data science. We offer practical and industry-focused programs that help professionals learn technical skills, build real-world projects, and advance their careers. Students learn practical skills, build real-world portfolio projects, and undergo job readiness training. Our tutors offer 24x7 guidance & mentorship over Slack & Zoom. Students also get access to jobs with 200+ hiring partners.
    ai-enhanced-learning
    developer-tools
    education
    machine-learning
  • WarpBuild
    WarpBuild (s2021)Active • 6 employees • San Francisco, CA, USA
    Get 30% faster, 50% cheaper CI builds in 30 seconds using WarpBuild cloud runners for Github Actions. Optimize your software development lifecycle through DORA, SPACE reports and AI powered insights.
    developer-tools
    generative-ai
    saas
    productivity
    devops
  • Evidently AI
    Evidently AI (s2021)Active • 2 employees • San Francisco, CA, USA
    We are building an open-source standard to monitor ML models in production. The tool is used by enterprise data science teams to operate their models reliably and detect and resolve issues.
    developer-tools
    machine-learning
    b2b
    open-source
  • GrowthBook
    GrowthBook (w2022)Active • 14 employees • Palo Alto, CA, USA
    GrowthBook is an open source platform to help companies make data-driven product decisions with feature flags and A/B tests. Existing SaaS solutions like LaunchDarkly require a company to send all of their data to them. This results in high costs, data compliance issues, and vendor lock-in. As a result, many companies end up building their own platforms in-house, which can take thousands of hours of work and lots of headaches. To solve this, GrowthBook uses a company's existing data infrastructure and business metrics. We believe feature flags and experimentation are the right way to build products at scale and that they will become a standard part of the development process. GrowthBook is well positioned to be a leader in this growing market.
    developer-tools
    b2b
    analytics
    open-source
  • HyperDX
    HyperDX (s2022)Active • 3 employees • San Mateo, CA, USA
    HyperDX assists engineers in resolving production bugs more quickly with simple workflows that take you from alert to resolution. You can get set up in a matter of minutes and correlate debug telemetry all in one place, including logs, metrics, traces, and browser session replays, allowing you to resolve issues faster than ever before. HyperDX is open source and built on top of Clickhouse and S3, so customers can enjoy ten times the savings when compared to traditional vendors like Datadog.
    developer-tools
    saas
    b2b
    open-source
    infrastructure
  • Vimmerse
    Vimmerse (w2022)Active • 10 employees • San Jose, CA, USA
    Designers, branding agencies, and on-line stores can use Vimmerse’s AI creators platform, Apps, and API to animate their images at scale making their business stand out from the crowd.
    developer-tools
    b2b
    video
    advertising
    ai
  • SimpleHash
    SimpleHash (w2022)Active • San Francisco, CA, USA
    SimpleHash allows developers to query all NFT data from a single platform. We index multiple blockchains, take care of edge cases, and can be integrated in a few lines of code. We make the lives of developers working with NFT data easier by abstracting away all the complexity. We serve some of the leading names in crypto / web3, including Brave, Rarible, Phantom and Nansen. We're growing quickly, are well-funded, and have an ambitious vision to organize the world of NFTs and digital assets. Join us if you're excited by a high impact role on a lean, fast paced team at the forefront of the revolution in digital assets.
    developer-tools
    saas
    crypto-web3
    nft
  • BricksAI
    BricksAI (s2022)Active • 2 employees • San Francisco, CA, USA
    BricksAI is an open-source AI gateway that helps you manage how each of your services is calling different LLM providers. You can create API keys with rate-limits, spend-limits, and expiration dates, then use them to make requests to different LLMs. With our SSO dashboard, you also get (1) role-based access control, and (2) fine-grained metrics (e.g. cost, number of requests, tokens) over each API key.
    developer-tools
    b2b
  • 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
  • Slapdash
    Slapdash (w2019)Acquired • 6 employees • San Francisco, CA, USA
    Slapdash brings all your apps together in one place to give you new superpowers. It's a new type of tool that makes modern computer work less tedious and more fun. It's just one neat trick: we make your workflow insanely fast. We have built a low-latency, file-system for your cloud apps as well as the fastest interface in the world to drive it: the Command Bar.
    developer-tools
    productivity
  • Bitnami (w2013)Acquired • 75 employees • San Francisco, CA, USA
    Packaged Applications for Any Platform. Bitnami has automated the ability to package, deploy and maintain applications, lowering the barrier to adoption for anyone to deploy and maintain a full spectrum of server applications, development stacks and infrastructure applications in virtually any format. Simply click to deploy any one of 120+ ready-to-run applications from the Bitnami Application Catalog or use Bitnami Stacksmith to package and migrate your custom in-house applications to the cloud. For more information, visit www.Bitnami.com, or follow us on Twitter (@Bitnami) and Facebook.
    developer-tools
  • FeaturePeek
    FeaturePeek (s2019)Acquired • 4 employees • San Francisco, CA, USA
    FeaturePeek creates supercharged deployment previews of your frontend that you can share to quickly get feedback on your implementation in progress. A drawer overlay is added on top of your site that makes it easy for your reviewers to take screenshots with annotations, capture screen recordings, leave comments, create tickets on popular bug-tracking platforms, and more. You get this functionality just by deploying to FeaturePeek — no dependencies or code changes needed.
    developer-tools
    saas
  • Swiftype
    Swiftype (w2012)Acquired • 50 employees • San Francisco, CA, USA
    Swiftype is an Elastic company. https://blog.swiftype.com/2017/11/09/swiftype-joins-forces-with-elastic/ Swiftype App Search is now generally available. https://blog.swiftype.com/2018/05/16/app-search-now-generally-available/ Swiftype’s industry leading search platform delivers accurate, relevant and customizable search results for businesses. Swiftype’s suite of products, Site Search, App Search and Enterprise Search, have revolutionized the way people find information across their organization and on public facing websites.
    developer-tools
    saas
    b2b