YC List
50 classes 6,350 companies
List of Y Combinator companies by class
2026
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Summer 2026
231 companies -
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Spring 2026
193 companies -
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Winter 2026
197 companies
2025
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Fall 2025
145 companies- SF Tensor Infrastructure for AI labs to focus on research.
- Hypercubic Agentic AI for Mainframe Operations and Modernization
- Zalos Hire Zalos AI workers to run your finance department
- Perseus Applied Lab focused on Search in Latent Spaces.
- Multifactor Zero-trust authentication, authorization, and auditing for AI agents
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Summer 2025
166 companies -
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Spring 2025
144 companies -
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Winter 2025
165 companies
2024
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Fall 2024
94 companies- Archil The high-performance file system that connects AI to data
- Endstack The complete, collaborative workspace for humans and agents
- Durate Self-running physician scheduling
- Origami Enter your domain & Origami gets you customers.
- Vortexify Build full-stack applications for business operations with AI
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Summer 2024
248 companies- Henry Automating Deal Decks for Commercial Real Estate Brokers
- Biocartesian Converting biology into digital molecular maps
- Scape The intelligent inbox that works for you
- Dayflow Generate a detailed log of everything you've worked on, automatically.
- Anthrogen We work on generalizable tools for the next era of biotech.
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Winter 2024
248 companies
2023
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Summer 2023
220 companies -
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Winter 2023
274 companies
2022
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Summer 2022
233 companies- Paces Agentic AI for Power Projects and AI Infrastructure
- Birch Biosciences We recycle plastic using engineered enzymes
- FlyCode Recover failed subscription payments to increase retention and LTV
- AiPrise AI-powered Global Compliance Platform
- Disclo Health disclosure and accommodation management platform
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Winter 2022
398 companies- Loops Email sending for software companies
- Flagright AI-native AML compliance platform for fintechs & banks
- Complif Compliance tools & AI agents for financial entities
- Remi Simplifying roofing for homeowners, roofers and enterprises.
- Scout The smart testing platform that unlocks digital health at home.
2021
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Summer 2021
391 companies- Formance Open Source Infrastructure for the Financial Internet
- Artillery The complete production quality platform. AI-powered E2E testing,…
- Varos AI Business Analysts to gather requirements and optimize processes
- Bolster The platform for buying, selling and managing residential construction
- ShipBlu Amazon Level Logistics for eCommerce Companies in MENA.
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Winter 2021
335 companies
2020
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Summer 2020
209 companies- Mailwarm Prevents your emails from landing in spam.
- Osmind Platform for breakthrough mental health research and treatment
- Dataland AI agents for customer support.
- Notabene The Notabene platform is the trust layer for global money movement.
- Daybreak Health The first digital mental health system for youth
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Winter 2020
229 companies- Raycast Speed up non-coding tasks for engineering teams
- Karat Financial Business banking that helps you grow
- Skypher AI agent for Compliance Questionnaires Automation
- Signadot Scalable validation infrastructure for AI agents
- Turing Labs Inc. AI for R&D of consumer brands like P&G to develop better products
2019
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Summer 2019
174 companies- Lucid Bots We build robots for dull, dirty, and dangerous jobs.
- LineLeap LineLeap gets customers to the fun, faster.
- Outtalent We help top engineers from emerging markets get jobs abroad at…
- Wren Wren is a monthly subscription to offset your carbon footprint.
- Curri Construction & industrial logistics platform.
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Winter 2019
194 companies- Mobot Mobot is a QA-as-a-service platform using actual mechanical robots
- FLOWER CO. FLOWER CO. sells weed on the internet.
- Keeper AI tax filing for complex returns
- Probably Genetic Patient Intelligence Platform for Genetic Disease
- Overview Reshaping industrial quality with AI, hardware, and software
2018
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Summer 2018
131 companies- Papa One-stop-shop for flexible family care
- Inscribe AI Document Fraud Detection for Banks, Credit Unions & Lenders
- Corvus Robotics Autonomous drones to help warehouses scan inventory.
- Pine Park Health We provide primary care in senior living communities.
- Names & Faces Technology to create fast, visual indexes of people and organizations.
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Winter 2018
146 companies- Tradewind BioScience Tradewind translates scientific insight into innovative ways of…
- Nectome Human whole body end-of-life preservation for later revival.
- Shogun Shogun empowers brands to create exceptional ecommerce experience.
- Acely Every student's AI coach for college readiness
- Spellbrush Making Anime Real
2017
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Summer 2017
125 companies- Aecore Vertically integrated commercial construction
- May Mobility Transforming cities and rural areas through AV transit and technology
- Officely Office management software for hybrid workspaces
- Leon & George Buying and owning indoor potted plants made easy.
- Rabbet The financial foundation for every real estate development decision
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Winter 2017
116 companies- Mednet Mednet helps doctors answer their toughest clinical questions —…
- Sinovia Technologies Flexible printed OLED displays.
- Bitrise Hosted Continuous Integration and Delivery for mobile apps
- Sleep Reset One clinic for every sleep issue
- BIOS Health Neural interfaces to understand and use nerve data in medicine.
2016
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Summer 2016
102 companies- Athelas Extensible, Integrated Technology that Simplifies Health Systems
- Nova Credit Bridging a world of consumer-permissioned credit data
- RocketLit RocketLit is an adaptive learning and assessment platform.
- Women Who Code WWCode is a non profit that empowering diverse women to excel in tech.
- ApolloShield ApolloShield is a system that detects unwanted drones and drives them…
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Fellowship 2
18 companies- Zube Project management for Github issues
- Ctzen 311 for the developing world
- Pramp A free peer-to-peer technical mock interviewing platform for engineers
- Squire OpenTable for barbershops
- Awesound Publish your audiobook in minutes, charge subscriptions for a paid podcast, and sell audio directly from your own website.
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Winter 2016
122 companies- Stealth Worker Information Security (Cyber Security), Compliance and Privacy (GDPR &…
- Sanitation and Health Rights in India (SHRI) Sanitation and Health Rights in India (SHRI) fights alongside communities to end open defecation as a key step in an ongoing struggle for...
- NetBeez Network monitoring from the end-user perspective
- GetAccept Close deals faster. Digitally.
- Astranis Advanced satellites for high orbits.
2015
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Fellowship 1
19 companies- finbox.io Easy to use fundamental investing tools
- Apify Formerly Apifier. The web scraping and automation platform, which enables to turn any website into an API.
- Pawprint All your pet's data in one place
- DNAsimple Donate and find DNA samples online
- Canvas Medical Canvas is a predictive charting interface designed and built exclusively for primary care
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Summer 2015
104 companies- Leaders In Tech Become the leader your company needs.
- SnapMagic AI-assisted electronics design
- Scentbird Scentbird is a luxury fragrance subscription service.
- Branch8 Branch8 helps sellers to list and manage products on e-commerce…
- Go1 A learning platform that enables you to train your staff or customers.
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Winter 2015
110 companies
2014
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Summer 2014
78 companies -
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Winter 2014
74 companies- AirHelp AirHelp helps air passengers get compensation for delayed, cancelled…
- Ambition Coaching and gamification software for sales teams.
- MixerBox AI Super-Apps to Live Easier | The anything anytime superapps…
- PiinPoint PiinPoint helps businesses find the best locations for growth
- Cambly On-demand access to English tutors over video chat.
2013
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Summer 2013
52 companies- Lob Lob is the only automation platform that transforms direct mail into…
- Panorama Education Improving education for every student.
- Asseta Sourcing marketplace for semiconductor fab spare parts.
- Webflow Professional website design and publishing platform.
- Estimote, Inc. Location intelligence platform
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Winter 2013
46 companies- Goldbelly Empowering restaurants and small food makers to ship nationwide.
- Fivetran The leader in automated data movement
- SimplyInsured We sell health insurance to small businesses 100% online.
- Lollipuff Online Auctions for Authentic (Women's) Designer Goods
- CircuitLab Online circuit simulator and electronic schematic editor.
2012
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Summer 2012
83 companies- Flightfox A platform to plan, book and manage global and group travel.
- Zentail We're making ecommerce simple connecting brands with sales channels
- Rainforest no-code end-to-end testing that integrates with any CI/CD pipeline
- ClassDojo Communication app for K-8 teachers, kids, and families
- SmartAsset Marketplace connecting consumers to financial advisors
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Winter 2012
66 companies- CircuitHub On-Demand Electronics Manufacturing
- Rescale High Performance Computing Built for the Cloud
- CleverDeck Collaborate with an artist to commission original artwork you'll live…
- HireArt Gives businesses everything needed to hire & manage W2 contractors.
- Shoptiques Shoptiques.com lets you shop the world's best local boutiques online.
2011
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Summer 2011
60 companies -
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Winter 2011
45 companies- Instapainting Custom-made artwork from artists e-commerce marketplace.
- You Got Listings All-in-one apartment Marketing Platform for brokerages and landlords.
- Storyworth Record your family stories and print them in beautiful keepsake books.
- Tumult Tumult is building the next generation of apps for web design. Our…
- SingleStore The cloud-native, operational database built for speed and scale.
2010
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Summer 2010
36 companies- AnyList One app for stress-free shopping, cooking, and meal planning.
- WorkFlowy WorkFlowy is a better way to manage information. It provides a simple…
- inDinero Financial dashboard for businesses.
- Docker Software development platform.
- Recurse Center The retreat where curious programmers recharge and grow
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Winter 2010
27 companies- 500Friends the best loyalty and retention marketing partner for CMOs.
- Zencoder Video Encoding API, Open source video player (video.js)
- Optimizely The first all-in-one operating system for marketing
- Infoharmoni Inforharmoni is a data visualization company that visualizes real-time social web and aggregates content.
- Crocodoc Embed PDFs, PowerPoints, and other documents into web and mobile apps
2009
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Summer 2009
26 companies -
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Winter 2009
16 companies- Volantio Post-booking revenue and capacity optimization for airlines…
- Foodoro Foodoro is a marketplace where people can buy specialty food directly from artisanal Foodmakers Our goal is to help people discover amaz...
- Echodio Sync and stream your music across any device. Acquired in 2009.
- Picurio Picurio is web-based photo sharing and photo management software.
- reMail Email search for iPhone. Acquired by Google in Feb 2010.
2008
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Summer 2008
22 companies- Poll Everywhere Interactive meetings and presentations
- CO2Stats Social and environmental web analytics. Acquired in December 2016.
- Posterous Dead simple blogs by email
- Anyvite Anyvite is a free site dedicated to event invitation creation and group organization. Launched in 2008, Anyvite provides users with the m...
- Slinkset Votable lists
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Winter 2008
21 companies- RescueTime Take Back Control of your Time
- Ninite Simple third-party app patching and deployment for Windows.
- Machine Zone Pioneers of mobile social gaming.
- Joberator Joberator was formed to tackle head-on the growing challenges and connection-gap issues in the STEM employment and recruitment marketplac...
- Omnisio Edit and enhance online video. Acquired by Google in July 2008.
2007
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Summer 2007
19 companies- SocialPicks SocialPicks is an investment community where members learn from each other.
- Disqus Add comments to your website.
- Splashup Splashup, formerly known as fauxto, is an online image editing service that provides some advanced tools and is unique for its incorporat...
- Songkick Songkick is the great live music startup. Since 2007, we’ve set about making it as easy, fun and fair as possible for you to see your fav...
- Appjet Y Combinator funded AppJet is an online programming tool for building simple web apps. Founded by former MIT students, AppJet intends to ...
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Winter 2007
14 companies- Virtualmin Virtualmin is taking on the lack of innovation in the server admin programs, like Plesk, by making a more accessable version for pages ma...
- Buxfer Buxfer helps you make better spending decisions by making it easy to…
- Tsumobi Messaging.
- Weebly Build a free website that grows with your business.
- Auctomatic Auctomatic, a Y Combinator company, offers an auction and marketplace management system for all of those individual sellers on such sites...
2006
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Summer 2006
10 companies- Scribd World's largest online library.
- OMGPop An independent flash game studio.
- Xobni Xobni makes your inbox and address book smarter. Xobni, and its Smartr product suite, discover all the people you've ever emailed, calle...
- Likebetter An online personality test game, where you look at two photos and choose which one you “Like Better”.
- Jamglue Jamglue is an online community allowing users to listen or mix music from a library of user-contributed music.
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Winter 2006
7 companies- Snipshot We sold Snipshot to Ansa in 2013.
- Wufoo Online form builder.
- Flagr Flagr enables users to share places, adding photos, video and descriptions from their mobile phone. They can then create maps and embed t...
- Inkling Inkling, based in Chicago, Illinois, offers collective intelligence solutions to help organizations make more informed decisions. Inkling...
- Clustrix Clustrix provides the leading scale-out relational database engineered for the cloud or data center. ClustrixDB is a drop-in replacement ...
2005
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Summer 2005
8 companies- Clickfacts ClickFacts is a Malware Software Solutions company for buyers and sellers of online media. Its automated plug and play malware discovery ...
- Reddit The frontpage of the internet.
- Loopt Loopt, based in Silicon-Valley and backed by leading venture capital firms Sequoia Capital and New Enterprise Associates, has created an ...
- TextPayMe Founded in 2005, TextPayMe is an SMS payment service that lets you send money to other people using cell phone text messaging. TextPayMe ...
- Infogami What is Infogami? The art of transforming data into meaningful information. Infogami Business Intelligence (BI) solutions turn raw data...
