YC List
50 classes 6,350 companies
List of Y Combinator companies by class
2026
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Summer 2026
231 companies- Caution Hosting platform for software you can't afford to have hacked
- Hilstart Autonomous Hardware Testing
- Synapse Semiconductor New semiconductors that merge compute and vision
- Locke The AI-native firm for public influence.
- ProvenMetal AI-native electronics manufacturing for the American industrial base
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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 -
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Summer 2025
166 companies -
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Spring 2025
144 companies- Cotool Security operations optimized for agents.
- Probo We help you get compliant while you focus on your business.
- Acolite AI Native Commercial Insurance Broker
- Foundation Industries We supply hard tech companies with critical components.
- Adentris Real-time AI Compliance & Revenue Integrity for Medical Providers
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Winter 2025
165 companies
2024
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Fall 2024
94 companies -
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Summer 2024
248 companies -
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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- Sherloq One place for all your queries, directly on your SQL editor
- Ohm Ohm helps engineering teams accelerate hardware development & testing.
- Untether Labs Scheduling software for digital health clinics to do more with less.
- ZeroDev Account abstraction wallets as a service
- Chart Realtime Access to Verified Tax Records
2022
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Summer 2022
233 companies -
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Winter 2022
398 companies- Stock Unlock Web-app | investment education and analysis tools for retail investors
- Cinder Infrastructure to protect companies from AI abuse
- Joon Health Pediatric digital therapeutic for the +100M families in the US
- Spade Spade is the data and AI platform for modern finance.
- Kaagaz 'Office' Suite for Mobile-first Businesses in India
2021
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Summer 2021
391 companies -
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Winter 2021
335 companies
2020
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Summer 2020
209 companies -
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Winter 2020
229 companies
2019
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Summer 2019
174 companies -
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Winter 2019
194 companies- XGenomes XGenomes is building the sequencing technology of the future.
- Deel The all-in-one HR and payroll platform for global teams
- Rune Talk & play multiplayer games with your friends!
- Aura Vision In-store analytics AI assistant to fix your retail stores
- Nabis Nabis is the largest licensed cannabis wholesale platform.
2018
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Summer 2018
131 companies- Corvus Robotics Autonomous drones to help warehouses scan inventory.
- Kunduz Kunduz provides instant answers to students' questions and makes…
- Four Growers Robots that feed the world - robotic harvesting and analytics
- Meru Health An online provider for greater mental health
- Pocket Worlds Our platform enables creators to build experiences, games, and worlds…
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Winter 2018
146 companies- Jasper.ai Jasper is a leader in creating content using Artificial Intelligence
- Modern Health A mental health benefits platform for employers.
- OpenSea This isn't just a marketplace; we're shaping the future of digital…
- Vena Medical Vena Medical is providing physicians with the world's smallest camera…
- Substack A place for independent writing.
2017
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Summer 2017
125 companies- Long Term Stock Exchange LTSE is an ecosystem for visionary business.
- Carrot Fertility Customized fertility benefits for modern companies.
- Aecore Vertically integrated commercial construction
- Roofr Sales software for roofers. Aerial measurements + proposals in seconds
- Rabbet The financial foundation for every real estate development decision
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Winter 2017
116 companies
2016
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Summer 2016
102 companies- Women Who Code WWCode is a non profit that empowering diverse women to excel in tech.
- Instrumentl Instrumentl automates grant discovery and management for nonprofits.
- Bird The world’s largest omnichannel communications platform
- Legalist Legal investment firm
- SmartPath Financial wellness for the middle class
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Fellowship 2
18 companies- Awesound Publish your audiobook in minutes, charge subscriptions for a paid podcast, and sell audio directly from your own website.
- Squire OpenTable for barbershops
- Ctzen 311 for the developing world
- Zube Project management for Github issues
- Pramp A free peer-to-peer technical mock interviewing platform for engineers
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Winter 2016
122 companies- GetAccept Close deals faster. Digitally.
- Netomi Self-Driving Customer Care
- Focal Systems Building the Operating System for B&M Retail using Deep Learning
- Daily Conversational Voice and Multimodal AI built with Open Source
- DevColor We give Black software engineers support they need to advance in tech.
2015
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Fellowship 1
19 companies- Clearbanc Financial services for self-employed, freelancers, independent contractors, and entrepreneurs
- Canvas Medical Canvas is a predictive charting interface designed and built exclusively for primary care
- finbox.io Easy to use fundamental investing tools
- Pawprint All your pet's data in one place
- NullSpace VR A haptic feedback suit for VR
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Summer 2015
104 companies- Gemnote Gemnote is the easiest way to design, create and send custom products.
- Shape (ShapeScale) ShapeScale is a personal 3D scanner and fitness tracker that…
- Shred Video Shred Video builds automated video & photo systems that allow…
- Microhealth Rare Disease-Focused Care Delivery and Evidence Generation Platform
- Teleport The Infrastructure Identity Company
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Winter 2015
110 companies- BuildScience The operating system for commercial buildings.
- Resolve Software to accelerate construction by finding issues in 3D BIM
- GiveMeTap We produce & sell stainless steel water bottles that enables people…
- Magic Extremely talented assistants for busy people
- Qventus We automate operations for hospitals and health systems
2014
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Summer 2014
78 companies -
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Winter 2014
74 companies- OpenCurriculum Helping K-12 teachers and school administrators build awesome…
- Cambly On-demand access to English tutors over video chat.
- Guesty The management platform for the short term rental industry.
- Noora Health Training patients and their families with health skills
- Flexport Platform for global logistics.
2013
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Summer 2013
52 companies- Lob Lob is the only automation platform that transforms direct mail into…
- Asseta Sourcing marketplace for semiconductor fab spare parts.
- Webflow Professional website design and publishing platform.
- Estimote, Inc. Location intelligence platform
- Panorama Education Improving education for every student.
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Winter 2013
46 companies- Lollipuff Online Auctions for Authentic (Women's) Designer Goods
- Watsi Watsi is the first global crowdfunding platform for medical…
- 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.
2012
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Summer 2012
83 companies- SmartAsset Marketplace connecting consumers to financial advisors
- Flightfox A platform to plan, book and manage global and group travel.
- Zentail We're making ecommerce simple connecting brands with sales channels
- Submittable The best way to launch, manage and measure social impact programs
- Mattermost Secure Collaboration for Technical Teams
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Winter 2012
66 companies- Shoptiques Shoptiques.com lets you shop the world's best local boutiques online.
- Rescale High Performance Computing Built for the Cloud
- CleverDeck Collaborate with an artist to commission original artwork you'll live…
- Medigram We are making a HIPAA-compliant, Groupme app for doctors to…
- Screenleap One-click screen sharing with installation-free viewing on all devices
2011
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Summer 2011
60 companies- MixRank Data products for sales, marketing, finance, recruiting, and more.
- AgileMD Predictive analytics and clinical pathways for hospitals
- Videopixie Marketplace for Video Production Services. We help you hire the best…
- Streak Streak transforms Gmail into a powerful CRM
- LeadGenius LeadGenius is an account-based marketing and lead generation…
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Winter 2011
45 companies- Zerocater Zerocater is revolutionizing how companies feed their employees
- Storyworth Record your family stories and print them in beautiful keepsake books.
- Tremendous How businesses send money to people at scale. Fast, free, global.
- Instapainting Custom-made artwork from artists e-commerce marketplace.
- You Got Listings All-in-one apartment Marketing Platform for brokerages and landlords.
2010
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Summer 2010
36 companies- Recurse Center The retreat where curious programmers recharge and grow
- inDinero Financial dashboard for businesses.
- AnyList One app for stress-free shopping, cooking, and meal planning.
- DemandSphere SEO & Content Marketing Intelligence
- WorkFlowy WorkFlowy is a better way to manage information. It provides a simple…
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Winter 2010
27 companies- 500Friends the best loyalty and retention marketing partner for CMOs.
- Zenedy Zenedy Zenedy was started as a means to showcase information about obscure topics from around the web.
- Optimizely The first all-in-one operating system for marketing
- Zencoder Video Encoding API, Open source video player (video.js)
- OwnLocal OwnLocal automates marketing for over 129,000 SMBs through 3,300…
2009
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Summer 2009
26 companies- Olark Olark gives you an AI agent that works your marketing funnel 24/7
- Mixpanel Mixpanel is event analytics for builders that need answers.
- Directed Edge Product recommendations.
- Lingt Lingt provided a web-based platform for learning languages leveraging…
- Listia Mobile marketplace for trading used goods.
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Winter 2009
16 companies- Volantio Post-booking revenue and capacity optimization for airlines…
- Wattvision Sensors and software for energy tracking. Like 'fitbit' for your…
- Echodio Sync and stream your music across any device. Acquired in 2009.
- Picurio Picurio is web-based photo sharing and photo management software.
- Cloudkick Cloudkick is system to manage cloud servers, such as the Rackspace Cloud and Amazon's EC2. Cloudkick provides an easy to use monitoring/...
2008
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Summer 2008
22 companies -
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Winter 2008
21 companies- Ninite Simple third-party app patching and deployment for Windows.
- RescueTime Take Back Control of your Time
- 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.
- MightyQuiz MightyQuiz powers a collection of user generated quiz questions that can be answered and rated on-site or through a distributable widget.
2007
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Summer 2007
19 companies- Appjet Y Combinator funded AppJet is an online programming tool for building simple web apps. Founded by former MIT students, AppJet intends to ...
- Dropbox Backup and share files in the cloud.
- Splashup Splashup, formerly known as fauxto, is an online image editing service that provides some advanced tools and is unique for its incorporat...
- Blue Frog Gaming Browser game studio behind Starfleet Commander. Its successor SFC2 is a free, persistent space strategy MMO.
- Disqus Add comments to your website.
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Winter 2007
14 companies- Buxfer Buxfer helps you make better spending decisions by making it easy to…
- 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...
- Auctomatic Auctomatic, a Y Combinator company, offers an auction and marketplace management system for all of those individual sellers on such sites...
- Weebly Build a free website that grows with your business.
- Octopart Octopart is a search engine for electronic components
2006
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Summer 2006
10 companies- Scribd World's largest online library.
- Xobni Xobni makes your inbox and address book smarter. Xobni, and its Smartr product suite, discover all the people you've ever emailed, calle...
- OMGPop An independent flash game studio.
- 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.
- Clustrix Clustrix provides the leading scale-out relational database engineered for the cloud or data center. ClustrixDB is a drop-in replacement ...
- Flagr Flagr enables users to share places, adding photos, video and descriptions from their mobile phone. They can then create maps and embed t...
- Wufoo Online form builder.
- Inkling Inkling, based in Chicago, Illinois, offers collective intelligence solutions to help organizations make more informed decisions. Inkling...
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 ...
- Memamp Better Desktop search solution.
