B2B Software and Services Startups funded by Y Combinator (YC) in the San Francisco Bay Area 2026

Deel is the all-in-one payroll and HR platform for global teams. Built for the way the world works today, Deel combines HRIS, payroll, compliance, benefits, performance, and equipment management into one seamless platform. With AI-powered tools and a fully owned payroll infrastructure, Deel supports every worker type in 120+ countries—helping businesses scale smarter, faster, and more compliantly. Discover how Deel makes global work simple at deel.com.

Faire is an innovative online marketplace that uses machine learning to match local retailers with the brands and products that uniquely fit their stores. We are using the power of technology to connect brands and independent retailers from all over the world, building a thriving community of hundreds of thousands of retailers, which has resulted in over 7 million new connections to date. Faire was founded on the belief that the future of retail is local. Our mission is to empower brands and retailers to strengthen the unique character of local communities. Our data-driven approach unburdens retailers from decades-old obstacles by helping find the right products for their shop. Plus, our straight-forward financial terms level the playing field by eliminating inventory risk and providing access to capital—key offerings previously only available to big box chains. For brands, our platform provides powerful sales, marketing, and analytics tools that simplify their business and allow them to focus on what they love: making great products.

Rippling gives businesses one place to run HR, IT, and Finance. It brings together all of the workforce systems that are normally scattered across a company, like payroll, expenses, benefits, and computers. For the first time ever, you can manage and automate every part of the employee lifecycle in a single system. Take onboarding, for example. With Rippling, you can hire a new employee anywhere in the world and set up their payroll, corporate card, computer, benefits, and even third-party apps like Slack and Microsoft 365—all within 90 seconds. Based in San Francisco, CA, Rippling has raised $1.2B from the world’s top investors—including Kleiner Perkins, Founders Fund, Sequoia, Greenoaks and Bedrock.

Scale accelerates the development of AI within organizations of any size to deliver critical business insights and operational efficiency. Its data-centric infrastructure platform leverages RLHF (Reinforced Learning with Human Feedback) to help organizations build the strongest AI models that supercharge their business, with customers across industries including Meta, Microsoft, U.S. Army, DoD’s Defense Innovation Unit, Open AI, General Motors, Toyota Research Institute, Brex, Instacart and Flexport.

In today’s environment, employees need training to ensure business compliance, skill development and to support an engaged workforce. Go1 brings together content from the world’s top training providers and makes it easy to access in whichever platform your organization uses. This makes it easier to deliver, manage and engage with training. Go1 also works with existing LMS, HRIS, and business systems to make learning simpler and more effective.

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.

GrubMarket is the AI-powered technology enabler and digital transformer of American Food Supply Chain industry. Our mission is to build and provide the eCommerce and software technologies to this industry, to transform this completely offline and highly manual industry into modernized online industry powered by software technologies, and improve the efficiency of American food supply chain.

Checkr builds people infrastructure for the future of work. And we believe everyone should have a fair chance to work. That's why we've designed a faster—and fairer—way to screen job seekers. For more information on our mission and products, visit https://checkr.com.

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

Founded in 2013, we believe trade can move the human race forward. That’s why our mission at Flexport is to make global trade easy for everyone. What the internet has done for bits and bytes, Flexport is doing for physical goods: giving every business the ability to connect to any customer, wherever they are in the world. That sounds pretty straightforward, but a fragmented and inefficient global supply chain has held the world back from untapped growth and innovation. By connecting everyone in the global economy we can unlock commerce, creativity, and human progress. To do so, we’re building the platform for global logistics—empowering buyers, sellers and their logistics partners with the technology and services they need to grow and innovate. Today, we work with more than 40,000 customers and their suppliers across industries like manufacturing, retail, electronics, consumer goods, tech, apparel, and beauty. Companies of all sizes—from emerging brands to Fortune 500s—used Flexport technology to move nearly $19B of merchandise across 112 countries in 2021. Interested in joining our team? Check out our open job postings on careers site and apply directly today! https://www.flexport.com/careers/jobs/

Webflow is the leading no-code visual web development platform. It seamlessly generates sophisticated code so anyone can build powerful web-based businesses and adapt to changes without developers or months of building. From entrepreneurs and creative agencies to Fortune 500 companies, Webflow makes the internet a more inclusive place by making the tools to build on it more accessible to more people, fueling business growth. Webflow powers websites for innovators like Discord, Monday.com, IDEO, Orange Theory Fitness, TED, and Dropbox. Webflow is backed by Y Combinator, Accel, CapitalG, Silversmith, and other awesome investors.

Fivetran automates data movement out of, into and across cloud data platforms. We automate the most time-consuming parts of the ELT process from extracts to schema drift handling to transformations, so data engineers can focus on higher-impact projects with total pipeline peace of mind. With 99.9% uptime and self-healing pipelines, Fivetran enables hundreds of leading brands across the globe, including Autodesk, Conagra Brands, JetBlue, Lionsgate, Morgan Stanley, and Ziff Davis, to accelerate data-driven decisions and drive business growth. Fivetran is headquartered in Oakland, California, with offices around the world. 

Biotechnology is rewriting life as we know it, from the medicines we take, to the crops we grow, the materials we wear, and the household goods that we rely on every day. Biotech R&D is radically transforming our world, but to move at the new speed of science, scientists need better technology. Benchling’s mission is to unlock the power of biotechnology. The world’s biotech leaders and innovators use our R&D Cloud to power the development of breakthrough products and accelerate time to milestone and market.

Founded in 2011, Zapier is the #1 workflow automation platform for small and mid-sized businesses. By connecting more than 6,000 of the most popular work apps, Zapier empowers its users to make the most of the tools they already use—and to focus on what matters most.

Dropbox is building the world’s first smart workspace. Back in 2007, making work better for people meant designing a simpler way to keep files in sync. Today, it means designing products that reduce busywork so you can focus on the work that matters. Most “productivity tools” get in your way. They constantly ping, distract, and disrupt your team’s flow, so you spend your days switching between apps and tracking down feedback. It’s busywork, not the meaningful stuff. We want to change this. We believe there’s a more enlightened way to work. Dropbox helps people be organized, stay focused, and get in sync with their teams.

Mixpanel is analytics for builders that need answers from their data at their fingertips. When everyone in the organization can see — and learn from — the impact of their work, they are poised to make better decisions. Companies like OpenAI, Netflix, Pinterest, sweetgreen, CNN, samsara, Uber, and Yelp use Mixpanel to understand their customers, measure progress, and endeavor to make better decisions.

PagerDuty is an operations performance platform delivering visibility and actionable intelligence across the entire incident lifecycle. Their SaaS-based solution empowers over 10,000 small, mid-size and enterprise global customers such as Comcast, eHarmony, Slack and Lululemon with the insight to intelligently respond to critical disruptions for exceptional customer experience. PagerDuty was founded to deliver a new and innovative approach to increase business response and efficiency. When brand reputation depends on customer satisfaction, PagerDuty arms businesses with the insight to proactively manage incidents and events that may impact customers across their IT environment.

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.

Launched in 2012 as ZenPayroll, Gusto serves more than 300,000 businesses nationwide. Each year we process tens of billions of dollars of payroll and provide employee benefits—like health insurance and 401(k) accounts—while helping companies create incredible work places. Through one refreshingly easy, integrated platform, we automate and simplify your payroll, benefits, and HR, all while providing expert support. You and your employees will get the peace of mind you need to do your best work.

At Optimizely, we're on a mission to help people unlock their digital potential. We do that by reinventing how marketing and product teams work to create and optimize digital experiences across all channels. With Optimizely One, our industry-first operating system for marketers, we offer teams flexibility and choice to build their stack their way with our fully SaaS, fully decoupled, and highly composable solution. We help companies around the world orchestrate their entire content lifecycle, monetize every digital experience and experiment across all customer touchpoints – all through Optimizely One, the leading digital experience platform that powers every phase of the marketing lifecycle through a single, AI-accelerated workflow. Optimizely has nearly 1500 employees across our 21 global offices and has 700+ partners. We are proud to help more than 10,000 businesses, including H&M, PayPal, Zoom, and Toyota, enrich their customer lifetime value, increase revenue and grow their brands. At Optimizely, we live each day with a simple philosophy: large enough to serve, small enough to care. Learn more at optimizely.com.

BaseFrame helps hardware teams build more efficiently by identifying design gaps, data-driven tradeoffs, and component availability issues before the first board is spun, catching fatal mistakes while they are still cheap to fix. We want to speed-up hardware teams so that they can build the cool innovations they are trying to bring to life with fewer bottlenecks. The current hardware workflow is a broken sequence of handoffs: you finalize a design and send it to procurement, only to discover weeks later that there was an oversight or a critical component has a massive lead time. How It Works • Project Scoping: Specialized AI agents ask you questions to scope out the project and uncover gaps, drilling down with follow up questions if needed or handing off to the next agent when sufficient. It provides suggestions and recommendations for each question, making sure we have thought about everything early on. • Validations: Once the questions are answered, we consolidate them into a document and run parallel agents to once again find issues, contradictions, or areas of improvement. • BOM Generation: Our AI splits the scope into a block diagram and generates a Bill of Materials (BOM) for each by parsing diagrams and tables from datasheets, getting price and lead time data from top vendors, and internal vendor communications. • Versioning & Parallel Agents: You can branch designs and use parallel agents to simulate multiple architectures simultaneously, revealing quantitative tradeoffs in cost, price, and lead times We met during our first week of college and became roommates at Berkeley, and are excited to make physical innovation easier!

Martini is a collaborative, AI-native platform for professional filmmaking in the era of generative media. By integrating the best generative models into professional workflows, we enable world-class creatives to harness generative AI as a legitimate medium for film.

Sparkles is like Lovable for existing projects, so even Sharon from Marketing can change the button styling on the front page without going back and forth with the dev team. Someone technical connects their GitHub to Sparkles, sets up the repository and environment variables, and then anyone on the team with a @yourcompany.com email can log in on Sparkles and create pull requests without needing to know what Git is.

Shofo builds large-scale social media training datasets by collecting, labeling, and enriching public content for pre-training and fine-tuning AI models. Our indexes continuously collect and update every post across hard to access social media platforms. Companies use Shofo to avoid building their own data collection and processing systems and spending months turning unstructured social content into model-ready data. We started with TikTok and are expanding across every major social platform.

Here's the problem: it takes private equity firms and search funds hours to write personalized messages for each outreach campaign. We speed this up by using AI to research each company across its website and social channels. Our platform helps you: 1) Research market niches to refine your investment thesis 2) Search for leads in our constantly-growing database 3) Design custom campaigns with personalized messaging 4) See inbound interest and track all prospects/communications in our CRM

Our mission at 10x Science is to enable biopharmaceutical development to keep pace with AI-powered drug discovery. Thanks to AI, the front end of drug discovery is flooding the pipeline with new drug candidates. However, current solutions for drug development are unable to resolve drug complexity and cannot keep up with modern demand. Our platform is the unlock for this bottleneck. By applying modern AI to the development stage, specifically to protein characterization and quality assessment, we provide an end-to-end solution to dramatically speed up and scale up the preparation of candidates for the clinic. Our team is composed of Stanford University researchers from a Nobel Laureate's lab with 18+ years of collective domain expertise, 47+ scientific publications, and a 2x YC Founder. We move at the highest velocity and are positioned to lead the next-generation of modern AI drug development.

Bizzy handles your calls, captures and qualifies leads, and books appointments directly into your CRM. It understands your services better than a receptionist would, routes and escalates calls, and syncs with your existing tools to incorporate complex workflows, all so your team can focus on servicing leads, not qualifying them.

Cardboard is an agentic video editor for growth/marketing teams and serious creators who need to ship videos consistently. Instead of agencies, long timelines, and infinite review cycles, teams give cardboard a footage + a goal (“3 variants”, “30s hook”, “testimonials”) to get a strong first cut in minutes on which they can iterate quickly. Multimodal LLMs can finally reason over footage, and WebGPU/WebCodecs make a real NLE possible in the browser. For the first time, an “AI director” inside a professional editor can be a reality. We have to build two hard things at once: a high-performance editor in the browser and an agentic editor that is reliable for production use cases. Most startups do one; incumbents can’t rebuild their stack without breaking everything. Saksham and Ishan met in school and have known each other since 15 years. Saksham was Co-founder/CTO of Iterate AI (backed by EF) and posts content on social media; Ishan has spent ~5yr building memory-heavy, performance-critical browser apps at HackerRank (S11) and deeply understands browsers. He has built Hotspoter (5M+ downloads) when he was 14. Together, we’re unusually suited to build the editor core others avoid. Video is becoming the default distribution channel, and the team that iterates fastest compounds attention. Cardboard becomes the default workspace for video production, the way Canva/Figma became the workspace for design - because it’s collaborative, fast, and does the tedious parts for you.

Fed10 is a legislative consulting firm staffed by AI agents. We monitor every bill across the U.S., flag threats to your business, and deliver actionable insights — the same work a $500/hr policy consultant does, but in seconds instead of days. Built by three ex-lobbyists who passed legislation together.

Chamber puts your AI infrastructure on autopilot. Our agentic AI enabled platform orchestrates, governs, and optimizes your AI infrastructure so teams can run ~50% more workloads on the same GPUs without manual intervention. It operates like an autonomous infrastructure team: continuously monitoring GPU clusters, forecasting demand, detecting unhealthy nodes, and reallocating resources in real time to where they create the most impact. Your ML teams move faster, infra waste drops, and GPU bottlenecks disappear.

If you’re tired of spending $ X0k+ and months on ESOP, contracts, compliance, fundraising, cross-border work, employment, or tech, we built Arcline for you. Arcline’s 50+ AI-native lawyers works at startup speed and price. So you can sell, raise, hire, and launch in hours, not months. Arcline lawyers are trained at top schools (Harvard, Stanford, Oxford) and leading firms (Cooley, Goodwin, Fenwick). Trusted by founders backed by YC, Sequoia, a16z, Founders Fund. We’re delivering the same top tier legal help to you, without the usual delay or cost. Think of us as your fractional in-house legal team, ready to deploy when needed. Discover Arcline if you want legal to stop being the bottleneck or crippling your runway.

Tensol is the AI-native operating system for hospitality. We replace legacy hotel ERPs and back-office software with one system that runs guest communications, bookings, reviews, procurement, and invoicing in a single place, where AI agents answer guest messages, send quotes and confirmations, update bookings, respond to reviews, and log everything directly in the system. We’re starting with guest communications and review management, where AI agents handle inbound guest requests and reviews end-to-end, making front-office teams 3x more productive, resolving 80% of inquiries automatically, increasing upsells and brand reputation.

We’re building AI agents that do on-call support for data-heavy industries like financial services and fintech, healthcare, and insurance. On-call engineers in these industries need to inspect data to debug production issues. We monitor both data and infrastructure for issues and use AI agents to debug and suggest fixes in minutes. Data is especially sensitive in regulated industries, so we offer on-prem deployments and hardware-backed secure environments that let agents safely use production data as context while debugging. Mitch and Shipra founded Corelayer after building data infrastructure together at Goldman Sachs, where they spent many late nights and weekends debugging systems that processed 100s of billions of rows a day.

RamAIn can automate any super complex, intelligent and repetitive process across applications (Windows + Mac + Browser + Desktop) super-duper fast. It doesn’t matter whether you have API access or not - if you can see it, RamAIn can do it. Current CUAs all follow the same decision loop: screenshot, VLM, decision, repeat. This is expensive, unreliable and slow. We build infrastructure to pre-train CUAs on specific interfaces, effectively teaching RamAIn to use your computer.

Visibl is an on-prem AI platform that turns compute into chip design capacity. As chips grow more complex, adding engineers yields diminishing returns — coordination costs rise while progress slows. The bottleneck is no longer ideas, but execution throughput. Visibl turns compute into a teammate. Our AI-native IDE ingests the full design context (code, specs, scripts, tool outputs) to decode ambiguous tool feedback into actionable steps. We validate changes and package decisions for review, resulting in safer changes, shorter iteration cycles, and fewer late surprises on the path to tapeout.

It's never been easier to turn ideas into apps, it should be just as easy to take those apps to production. SideKit provides one SDK to manage app versions, set feature flags and install privacy-first analytics to track usage. Update broke your paywall? One click to block the version. Made a breaking change and don't want users on your old version? One click to set a minimum version. Version gating is also completely free regardless of how many users you have.

Veriad is building AI compliance officers for enterprises. Our agent analyze documents, media, and processes against regulations, industry precedents, and internal policies - flagging what's compliant, what's not, and why. Rohan and Anton founded Veriad after building and selling internal compliance tools to Fortune 500 companies.

Edge AI is inevitable, but shipping it is painful: every device class behaves differently, runtimes vary, models are huge, and performance collapses under memory/power constraints. RunAnywhere turns that into an enterprise-ready workflow: one SDK to run models on-device, plus a control plane to manage models, enforce policies, and measure outcomes across thousands of devices.

Clice gives everyone on your team a personal AI agent that actually executes. Every agent knows their person's context, and every agent can talk to each other. Need an answer from someone who's offline? Your agent asks their agent. A bug gets fixed in prod? Your agent updates the ticket and responds to the thread. Need to meet before launch? Your agent coordinates with theirs and books it. Sales, eng, ops. If it involves communicating or coordinating across people, Clice handles it. You focus on the work that actually matters.

Multi-agent systems fail quietly today due to state drift, broken assumptions, and coordination breakdowns. Arzule ingests failed traces from tools like CrewAI, LangChain, Claude Code, and custom stacks, finds coordination failures, and generates a corrected trace. Users can approve or deny the correction so Arzule learns what “good” looks like in the context of the current project. It provides observability, debugging tools, failure detection, and patch plans that can be dropped back into agent workflows to improve costs, efficiency, and quality. Additionally, Arzule is currently offering early access to synthetic creation and labeling of multi-agent coordination tasks for companies who reach out.

We help teams fine tune and deploy models specialized for their domain and use cases. Generalist, proprietary models like gpt-5 and claude are impressive and have their place but for your most important tasks you need your AI agents to be powered by models that are specialists. Models you own, trained on your data, that can continuously improve for your use cases.

We turn existing store security cameras into an AI system that catches shoplifting in real time and alerts staff before thieves leave.

RLVR changed the game for post-training. We're here to build and supply the next-generation of coding data and RL environments using model checking languages and formal verification. In a world where solid coding data is becoming increasingly sparse, Haladir provides the data and environments needed to build the next generation of coding models.

Ressl AI is building AI Agents to disrupt IT Services. Enterprise applications like Salesforce are highly flexible and configurable, allowing them to adapt to the unique processes of different businesses. But implementing and maintaining Salesforce requires specialised Salesforce admins or outsourced consulting firms—both of which are expensive and slow. At Ressl AI, we’re building 10× AI Salesforce Admins. Our agents let IT and RevOps teams configure Salesforce in plain English, accelerating Salesforce delivery by 10× without adding headcount. Our agents can: > Document your Salesforce org > Find root causes of support issues > Perform analysis and dependency mapping > Configure flows and automations > Write Apex code and test classes > Upgrade orgs from legacy versions Before building Ressl, Arushi and Abhishek ran an IT consulting firm for six months, using those learnings to productise RevOps and Salesforce consulting. The global IT outsourcing market is projected to reach ~$600B in 2025. Ressl AI is excited to define what an agentic Accenture looks like.

Oxus is the AI-native platform modernizing internal audits. We turn hours of manual scoping, documentation, and control testing into review-ready outputs generated within minutes. With Oxus, audit teams deliver more audits, faster.

LegalOS is an AI-powered immigration law firm for complex U.S. work visas. Our AI agents generate a USCIS-ready petition package in 24–48 hours, including forms, support letters, and a structured evidence memo. Every case is reviewed and signed by licensed immigration attorneys with 40+ years of experience and a near-100% approval rate, so companies get both speed and reliability. LegalOS already supports O-1, H-1B, L-1A, L-1B, TN, EB-1A, EB-1C, and EB-2 NIW petitions and has a 100% approval rate so far across all visa categories.

We'd like to automate monitoring. To advance that mission, we're building Sonarly. Coding agents are amazingly good at building software. But they struggle fixing production bugs because they lack the right context for them. We give them that context, eliminating the time you spend on bug detection, session replay, issue description, and endlessly copy-pasting logs to your AI agent.