Y Combinator Startups in the San Francisco Bay Area 2025

December 2025

Browse 2038 of the top startups funded by Y Combinator. Headquartered in the San Francisco Bay Area, these are some of the hottest and fastest-growing startups. This doesn't include all companies originally founded in San Francisco Bay Area or by founders from there.

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

  • Deel
    Deel
    Y Combinator LogoW2019
    Active • 5,000 employees • San Francisco, CA, USA
    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.
    hr-tech
    b2b
    saas
    payroll
    fintech
  • Newfront
    Newfront
    Y Combinator LogoW2018
    Active • 800 employees • San Francisco, CA, USA
    Newfront is building the modern insurance brokerage. Transparent data delivered real-time translates into a lower total cost of risk and greater insights. We work with 20% of US unicorns, 100s of YC startups, and 150+ public companies on their Business Insurance and Total Rewards. Headquartered in San Francisco, Newfront has more than 800 colleagues and offices throughout the US.
    insurance
    fintech
  • Brex
    Brex
    Y Combinator LogoW2017
    Active • 1,000 employees • San Francisco, CA, USA
    Brex is the AI-powered spend platform for modern companies, from startups to enterprises. Combining corporate cards, expense management, travel, business accounts, and bill pay, Brex makes it easy to control spend before it happens with unprecedented efficiency and accuracy. Our mission is to empower employees anywhere to make better financial decisions, so we designed our platform to make expenses almost effortless with unrivaled automation of manual expense work and real-time tracking. Brex supports more countries and currencies than any other spend solution. Brex has tens of thousands of customers, including some of the most successful, high-growth companies, such as DoorDash, SeatGeek, Coinbase, ScaleAI, MasterClass, Indeed, Allbirds, and Superhuman. Brex offers: - Corporate cards with 10-20x higher limits - Business accounts with easy wires, same-day liquidity, fast global payments, and $6M in FDIC insurance - Reward options that include billboards, offsites, and coaching - Founder-friendly financial modeling tools - Special events and masterclasses for founders - Advanced spend management software as startups grow that includes global capabilities, travel, bill pay and more.
    fintech
  • Faire
    Faire
    Y Combinator LogoW2017
    Active • 900 employees • San Francisco, CA, USA
    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.
    marketplace
    retail
  • Clipboard
    Clipboard
    Y Combinator LogoW2017
    Active • 800 employees • San Francisco, CA, USA
    We exist to lift as many people up the socioeconomic ladder as possible. We dramatically improve lives by letting professionals turn extra time and ambition into career growth and financial opportunity. We achieve this with our app-based marketplace that connects workplaces and professionals, allowing professionals to book on-demand shifts and workplaces to access on-demand talent.
    health-tech
    healthcare
    consumer-health-services
    marketplace
  • Rippling
    Rippling
    Y Combinator LogoW2017
    Active • 2,500 employees • San Francisco, CA, USA
    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.
    hr-tech
  • Scale AI
    Scale AI
    Y Combinator LogoS2016
    Active • 500 employees • San Francisco, CA, USA
    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.
    artificial-intelligence
    machine-learning
  • Go1
    Go1
    Y Combinator LogoS2015
    Active • 650 employees • San Francisco, CA, USA
    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.
    elearning
  • GitLab
    GitLab
    Y Combinator LogoW2015
    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.
    open-source
    developer-tools
    devsecops
  • GrubMarket
    GrubMarket
    Y Combinator LogoW2015
    Active • 4,548 employees • San Francisco, CA, USA
    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.
    agriculture
    food-tech
    e-commerce
    supply-chain
  • Oklo
    Oklo
    Y Combinator LogoS2014
    Public • 50 employees • Santa Clara, CA, USA
    About Oklo Inc.: Oklo Inc. (Oklo) is developing advanced fission power plants to provide emission-free, reliable, and affordable energy. Oklo received a Site Use Permit from the U.S Department of Energy, has performed successful prototypic fuel fabrication, was awarded fuel material from Idaho National Laboratory, developed the first advanced fission combined license application accepted and docketed by the U.S. Nuclear Regulatory Commission, and is developing advanced fuel recycling technologies in collaboration with the U.S. Department of Energy and national laboratories. Oklo has been featured in Time, Newsweek, Wall Street Journal, CNBC, Popular Mechanics, Wired, Architectural Digest, Hyperallergic, POWER Magazine, has been the subject of a Harvard Business School case, and is featured in the Oliver Stone documentary Nuclear, among other features.
    climate
    small-modular-reactors
  • Checkr
    Checkr
    Y Combinator LogoS2014
    Active • 800 employees • San Francisco, CA, USA
    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.
    compliance
    enterprise-software
    api
    hr-tech
    artificial-intelligence
  • Algolia
    Algolia
    Y Combinator LogoW2014
    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
  • Flexport
    Flexport
    Y Combinator LogoW2014
    Active • 3,000 employees • San Francisco, CA, USA
    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/
    supply-chain
    saas
    logistics
  • Bellabeat
    Bellabeat
    Y Combinator LogoW2014
    Active • 134 employees • San Francisco, CA, USA
    Founded in 2014, Bellabeat is a data-centered wellness femtech company behind some of the most fashionably designed tech-powered wellness products and one of the fastest-growing wellness subscription services for women. Throughout the years, Bellabeat built the go-to wellness brand with a compelling ecosystem of solutions and services focused on women’s health. The success of the Leaf and Ivy wearables enabled the brand to expand to international markets and kickstart industry discussions on the importance of innovating in the design and development of tech products. Today, Bellabeat is leading the market shift with hyper-personalized holistic wellness offerings aligned with a women’s menstrual cycle.
    femtech
    fitness
    health-&-wellness
  • Webflow
    Webflow
    Y Combinator LogoS2013
    Active • 600 employees • San Francisco, CA, USA
    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.
    saas
    marketing
    design
  • DoorDash
    DoorDash
    Y Combinator LogoS2013
    Public • 8,600 employees • San Francisco, CA, USA
    Founded in 2013, DoorDash is a San Francisco-based technology company passionate about transforming local businesses and dedicated to enabling new ways of working, earning, and living. Today, DoorDash connects customers with their favorite local and national restaurants in more than 600 cities across the United States and Canada. By building intelligent, last-mile delivery technology for local cities, DoorDash aims to connect people with the things they care about — one dash at a time. Read more at blog.doordash.com, and find us on Glassdoor.
    e-commerce
    marketplace
  • Fivetran
    Fivetran
    Y Combinator LogoW2013
    Active • 1,200 employees • Oakland, CA, USA
    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. 
    data-engineering
    saas
    analytics
    b2b
  • Instacart
    Instacart
    Y Combinator LogoS2012
    Public • 3,000 employees • San Francisco, CA, USA
    Instacart is the North American leader in online grocery and one of the fastest-growing companies in e-commerce. Instacart’s same-day delivery and pickup services bring fresh groceries and everyday essentials to busy people and families across the U.S. and Canada in as fast as an hour. Since its founding in 2012, Instacart has become an essential service for millions of families, while also serving as an immediate, flexible earnings opportunity for hundreds of thousands of shoppers across North America. The company partners with more than 350 retailers and delivers from more than 25,000 stores across more than 5,500 cities in North America. Today, Instacart is accessible to more than 85% of households in the U.S. and more than 70% of households in Canada.
    e-commerce
    grocery
    delivery
  • Benchling
    Benchling
    Y Combinator LogoS2012
    Active • 750 employees • San Francisco, CA, USA
    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.
    b2b
    saas
    biotech
  • Zapier
    Zapier
    Y Combinator LogoS2012
    Active • 700 employees • Mountain View, CA, USA
    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.
    saas
    b2b
    automation
  • Coinbase
    Coinbase
    Y Combinator LogoS2012
    Public • 6,112 employees • San Francisco, CA, USA
    Founded in June of 2012, Coinbase is a digital currency wallet and platform where merchants and consumers can transact with new digital currencies like bitcoin, ethereum, and litecoin. Our vision is to bring more innovation, efficiency, and equality of opportunity to the world by building an open financial system. Our first step on that journey is making digital currency accessible and approachable for everyone. Two principles guide our efforts. First, be the most trusted company in our domain. Second, create user-focused products that are easier and more intuitive to use.
    crypto-web3
  • Scribd
    Scribd
    Y Combinator LogoS2006
    Active • 300 employees • San Francisco, CA, USA
    Scribd gives you access to millions of ebooks, audiobooks, magazines, podcasts, and more — all in one place, for one price. OUR VISION Inspire the world through stories and knowledge. OUR MISSION Build the largest and most accessible library connecting storytellers with their audience. If you love working with smart, motivated people, you’ll love working at Scribd. We value our employees, we demonstrate accountability, and we take action. We’re one team with a common goal: helping our customers flourish.
    ai-enhanced-learning
    edtech
    remote-work
  • Dropbox
    Dropbox
    Y Combinator LogoS2007
    Public • 4,000 employees • San Francisco, CA, USA
    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.
  • Airbnb
    Airbnb
    Y Combinator LogoW2009
    Public • 6,132 employees • San Francisco, CA, USA
    Founded in August of 2008 and based in San Francisco, California, Airbnb is a trusted community marketplace for people to list, discover, and book unique accommodations around the world — online or from a mobile phone. Whether an apartment for a night, a castle for a week, or a villa for a month, Airbnb connects people to unique travel experiences, at any price point, in more than 33,000 cities and 192 countries. And with world-class customer service and a growing community of users, Airbnb is the easiest way for people to monetize their extra space and showcase it to an audience of millions. No global movement springs from individuals. It takes an entire team united behind something big. Together, we work hard, we laugh a lot, we brainstorm nonstop, we use hundreds of Post-Its a week, and we give the best high-fives in town. Headquartered in San Francisco, we have satellite offices in Dublin, London, Barcelona, Paris, Milan, Copenhagen, Berlin, Moscow, São Paolo, Sydney, and Singapore.
    travel
    marketplace
  • Mixpanel
    Mixpanel
    Y Combinator LogoS2009
    Active • 410 employees • San Francisco, CA, USA
    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.
    analytics
    databases
    cloud-computing
    data-visualization
    b2b
  • Stripe
    Stripe
    Y Combinator LogoS2009
    Active • 7,000 employees • San Francisco, CA, USA
    Launched out of Y Combinator’s 2009 Summer batch, Stripe is a global technology company that builds economic infrastructure for the internet. Businesses of every size—from new startups to public companies—use our software to accept payments and manage their businesses online Stripe is a proud partner of YC companies—from Airbnb (S09) to Defog (W23)—to help them grow their businesses and increase the GDP of the internet.
    fintech
    banking-as-a-service
    saas
  • PagerDuty
    PagerDuty
    Y Combinator LogoS2010
    Public • 950 employees • San Francisco, CA, USA
    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.
    monitoring
    devops
  • Amplitude
    Amplitude
    Y Combinator LogoW2012
    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.
    b2b
    analytics
    data-visualization
    developer-tools
    marketing
  • Matterport
    Matterport
    Y Combinator LogoW2012
    Public • 201 employees • Sunnyvale, CA, USA
    Matterport is an immersive media technology company that is shaking up the 3D / VR world. Our team has built the first end-to-end system for creating, modifying, distributing, and navigating immersive 3D and virtual reality (VR) versions of real-world spaces on web and mobile devices. Matterport offers the world's most inexpensive and simplest way to capture 3D spaces. Our products include: - Matterport Pro Camera for capturing real spaces in 3D. It collects accurate visual and spatial data to map entire areas in minutes and is all about automation and ease of use. - The Matterport Cloud for processing and hosting 3D models - Matterport Portal, our system for viewing, editing, and managing models; collaborating with colleagues; and sharing models with others - Matterport 3D Showcase, a browser-based 3D media player, which allows anyone to view 3D models in their browser with no additional software - Matterport Core VR: All Spaces can be converted to VR and experienced on Samsung Gear VR or Google Cardboard (in beta), with additional device support coming soon. Matterport 3D media solutions power industries from real estate (residential, multi-family and commercial) and travel and hospitality (hotels, vacation rentals, and venue booking), to business listings, architecture, engineering and construction, news and entertainment, and everything in between. We’re growing fast. If you’re passionate about solving cutting-edge problems in computer vision and hardware design and creating order-of-magnitude improvements in the ability to easily create and share 3D models of real world spaces, we want to talk to you. See open positions at matterport.com/jobs. Try Matterport for yourself at matterport.com/try.
    computer-vision
  • Gusto
    Gusto
    Y Combinator LogoW2012
    Active • 2,400 employees • San Francisco, CA, USA
    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.
    b2b
    payroll
    health-insurance
  • Reddit
    Reddit
    Y Combinator LogoS2005
    Acquired • 2,000 employees • San Francisco, CA, USA
    Founded by Steve Huffman and Alexis Ohanian in 2005, Reddit is an online community where users submit, vote, and comment on content, news, and discussions. Nicknamed "the front page of the internet,"​ Reddit is one of the top ten sites in the United States (source: Alexa), with hundreds of millions of users each month on desktop, mobile web, and our official Android/iOS apps. Interested in joining our growing team? Check out about.reddit.com/careers
    community
    social
    social-media
    social-network
  • Optimizely
    Optimizely
    Y Combinator LogoW2010
    Acquired • 1,500 employees • San Francisco, CA, USA
    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.
    marketing
  • Haladir
    Haladir
    Y Combinator LogoW2026
    Active • 4 employees • San Francisco, CA, USA
    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.
    machine-learning
    reinforcement-learning
    data-engineering
  • Voltair
    Voltair
    Y Combinator LogoW2026
    Active • 5 employees • San Francisco, CA, USA
    Voltair builds drones that ‘perch’ like birds to recharge on power lines. The grid is the world’s largest machine. This allows our flying robots to go anywhere. Simply put, removing battery swaps is the last step to deploy UAVs autonomously at scale. After building drones for the Air Force and DARPA, Ronan realized this was both practical and technically feasible. Power utilities are the perfect first customer. From talking to 50+ power utilities (including our 3 customers), it’s clear that they need better tech to observe their 1000+ miles of line. A given utility pole is inspected about once a decade. Why is this timeline a problem? Inspections identify maintenance concerns before they cause faults. Faults cause power outages, and spark wildfires - like the Eaton Fire in early 2025 where 19 people lost their lives and nearly 10,000 structures were destroyed. Fires bankrupt utilities and make them uninsurable. Autonomous drones can deliver over 20x the inspection coverage for the same cost. Reducing wildfire risk is a top priority for our customers, and utilities already know drones are the best solution (early pilots find over 5x more maintenance concerns with drones than ground inspections). Hayden knows this best. He worked in system protection at a power utility throughout college. We’re operating as a full-stack power utility asset inspection contractor. Since June, we’ve validated our core charging tech on a power line, built 5x flying prototypes, and inspected ~2000 poles. We’re post-revenue. There’s 168M poles in the US. Going rates for inspections are ~$45/pole, a $7.6B market. The horizontals for a system of drones distributed on the grid are massive. Our drones are inexpensive (<$5k), so our margins look like a SaaS company. At scale we are a new infrastructure layer for data on the physical world.
    drones
    infrastructure
    energy
  • AxionOrbital Space
    AxionOrbital Space
    Y Combinator LogoW2026
    Active • 2 employees • San Francisco, CA, USA
    AxionOrbital Space builds foundation models that enable continuous visibility through clouds and darkness. Legacy optical satellites are rendered useless 70% of the time by weather and night cycles, while Synthetic Aperture Radar (SAR) produces data that is unintelligible to humans and breaks standard vision pipelines. We solve this by translating raw radar backscatter into analysis-ready optical imagery in real-time. Our proprietary architecture uses deterministic one-step diffusion to transform complex radar signals into clear, photorealistic images. This enables persistent, 24/7 situational awareness for defense, commodities trading, and disaster response, guaranteeing visibility even when the sky is blocked.
    deep-learning
    satellites
    weather
  • Travo
    Travo
    Y Combinator LogoW2026
    Active • 4 employees • San Francisco, CA, USA
    We are building the most accurate and comprehensive real estate data set for RV parks and similar niche asset classes. Travo is the one stop shop for anyone working in real estate to search any property or parcel of land and instantly access rental comps, ownership, zoning and financials. With our data, we build the best informed AI applications for real estate private equity firms, developers, and brokers.
    real-estate
    ai
    artificial-intelligence
  • Prana
    Prana
    Y Combinator LogoW2026
    Active • 4 employees • San Francisco, CA, USA
    Prana replaces the reactive, 15-minute annual physical with continuous, proactive care. We connect to your medical records and wearables to watch for "clinical drift," catching subtle declines in health that human doctors miss between visits. Most AI health apps are just chatbots. Prana is a full-stack medical provider. Our AI acts as a always-on physician that watches your data, explains your labs, and manages your prescriptions. Safety & Scale: We automate 90% of the "grunt work" (history taking, logistics, triage) so our human doctors can focus purely on high-leverage decisions. This allows us to offer <60 minute access to a physician, 24/7, for a fraction of the cost of traditional care. The Team: - Meer Patel (CEO): JHU BME. Deferred Brown Medical School to build Prana because code scales better than appointments. - Vishvam Rawal (CTO): Ex-Quant. Building high-frequency data infrastructure for health signals. - Sanjit Menon (CMO): Graduating MD Candidate. Deep clinical expertise to ensure our models practice good medicine. Traction: Live in beta with early users.
    health-tech
  • Ressl AI
    Ressl AI
    Y Combinator LogoW2026
    Active • 5 employees • San Francisco, CA, USA
    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.
    crm
    operations
    b2b
    workflow-automation
    artificial-intelligence
  • Oxus
    Oxus
    Y Combinator LogoW2026
    Active • 3 employees • San Francisco, CA, USA
    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.
    workflow-automation
    b2b
    compliance
    artificial-intelligence
  • LegalOS
    LegalOS
    Y Combinator LogoW2026
    Active • 3 employees • San Francisco, CA, USA
    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.
    legal
    b2b
    immigration
    hr-tech
    ai
  • Sonarly
    Sonarly
    Y Combinator LogoW2026
    Active • 2 employees • San Francisco, CA, USA
    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.
    developer-tools
    generative-ai
  • Caretta
    Caretta
    Y Combinator LogoW2026
    Active • 4 employees • San Francisco, CA, USA
    Caretta is a Sales Intelligence for revenue teams. It joins reps in live calls, helping them handle information requests, questions, and objections in real time. Caretta lives in Slack to join the team conversation. Caretta gets smarter automatically: every call expands its knowledge base and objection library, turning conversations into compounding organizational advantage.
    ai-assistant
    sales-enablement
    saas
    sales
  • Skillsync
    Skillsync
    Y Combinator LogoW2026
    Active • 2 employees • San Francisco, CA, USA
    Skillsync helps companies find engineers based on their code. It creates structured skill profiles of developers based on their open source contributions on GitHub. Using a Cursor-like interface, companies can search for specific capabilities like "deployed custom neural nets on edge" then qualify, shortlist and engage with engineers already building in their domain.
    open-source
    hr-tech
    recruiting
    artificial-intelligence
  • o11
    o11
    Y Combinator LogoW2026
    Active • 4 employees • San Francisco, CA, USA
    o11 brings bulge bracket level speed and output quality to capital markets firms of any size. Seamlessly integrated into every Microsoft 365 tool, it transforms your documents and models into a dynamic knowledge layer that drives research, modeling, and client ready deliverables with consistent precision.
    artificial-intelligence
    fintech
    finance
    b2b
  • Pocket
    Pocket
    Y Combinator LogoW2026
    Active • 6 employees • San Francisco, CA, USA
    Pocket is a tiny AI device that lives on your phone and turns everything you say and hear into clear notes, action items, and search. We combine custom hardware, AI, and software to build the best note-taking experience for people who talk and move fast
    artificial-intelligence
    note-taking
    hardware
    productivity
  • Didit
    Didit
    Y Combinator LogoW2026
    Active • 12 employees • San Francisco, CA, USA
    Didit is an AI-native, developer-first identity verification platform that makes KYC, AML, and fraud prevention instant, flexible, and transparent, with a seamless user experience and more than 70% lower costs.
    saas
    identity
    ai
  • Fifth Door
    Fifth Door
    Y Combinator LogoF2025
    Active • 3 employees • San Francisco, CA, USA
    Fifth Door unlocks the power of imagination by making it easy for everyone to create, share, and play games anywhere, with anyone. We exist to stimulate the creativity, connection, and joy that people get when they play games.
    gaming
    consumer
    ai
  • Avoice
    Avoice
    Y Combinator LogoW2026
    Active • 4 employees • San Francisco, CA, USA
    Avoice brings your studio’s work together on one intelligent platform that automates the parts of practice that drain time from design. It understands your sheets, specs, schedules, materials, codes, and past projects, allowing precise automation across documentation, coordination, QA/QC, and research. Avoice also transforms your firm’s design knowledge and material libraries into a connected and searchable system that preserves standards and elevates consistency. With every document, workflow, and insight in one place, tasks that once took hours now take moments, giving your team more clarity, more momentum, and more room for meaningful architectural work.
    architecture
    construction
    enterprise-software
    ai
Loading more companies...