YC List
48 classes 6,313 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 -
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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 -
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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- Extend Production-ready document processing
- Miracle Accelerate clinical trials with real-time, actionable insights
- Wild Moose Automating root cause analysis with generative AI
- Sherloq One place for all your queries, directly on your SQL editor
- Scanbase The API for Diagnostic Test Analysis (COVID-19, FLU, RSV, STD,…
2022
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Summer 2022
233 companies -
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Winter 2022
398 companies
2021
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Summer 2021
391 companies -
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Winter 2021
335 companies- REGENT All-electric seagliders for fast, affordable regional transportation
- Serna Bio Genetic Medicine with Small Molecules
- GimBooks GimBooks makes Bookkeeping Easy for small business owners
- Sendbox Fulfillment by Amazon for African merchants
- Weekday AI recruiter that runs outbound sourcing campaigns to find top talent
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- Glide Glide turns spreadsheets into beautiful, intelligent apps.
- Numero Modern fundraising software for political campaigns and nonprofits.
- Avo Fixing data quality in product analytics.
- Superb AI Superb AI provides end-to-end computer vision MLOps platform
- Handle Simplifying Payments and Compliance for Construction Suppliers
2018
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Summer 2018
131 companies- Activeloop Database for AI
- Quickchat AI Conversation Design platform to build Al Assistants tailored to your…
- Modern Treasury Payment operations tools for money movement.
- Alpha Vantage Developer-friendly and enterprise-grade APIs for financial market…
- Pocket Worlds Our platform enables creators to build experiences, games, and worlds…
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Winter 2018
146 companies
2017
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Summer 2017
125 companies- Candidately The digital storefront for staffing and recruiting teams.
- Pyka Autonomous electric airplanes
- Upfort Turnkey security & hassle-free cyber insurance from leading insurers
- Flock Safety The first public safety operating system that eliminates crime.
- Officely Office management software for hybrid workspaces
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Winter 2017
116 companies- Aella Diversified credit infrastructure powering payments across Africa.
- MDalgorithms Inc. Democratizing Dermatology with AI
- Bountiful An Operating System for agriculture.
- Mednet Mednet helps doctors answer their toughest clinical questions —…
- Nuvola Nuvola is transforming battery manufacturing, making EV batteries…
2016
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Summer 2016
102 companies- Multiply Labs Robotic production capacity for the pharma manufacturing industry
- Athelas Extensible, Integrated Technology that Simplifies Health Systems
- Vote.org No description available
- Yoshi Mobility Making car ownership and management frictionless.
- Validere A carbon MRV solution for energy and hard-to-abate sectors
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Winter 2016
122 companies
2015
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Summer 2015
104 companies- Thrive Agritech We design and manufacture energy efficient LED lighting fixtures for…
- teaBOT A robot that makes tea!
- Shape (ShapeScale) ShapeScale is a personal 3D scanner and fitness tracker that…
- Xendit Provides payment infrastructure for Southeast Asia
- Tesorio Tesorio is the cash flow performance platform that helps finance…
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Winter 2015
110 companies- Giveffect Fundraising, Volunteer and Donor Management SaaS for nonprofits.
- Flip Community-driven marketplace for sneakers.
- Meadow Point of Sale and Compliance SaaS for Cannabis Dispensaries
- eBrandvalue Real-time Nielsen ratings for Brands.Accelerate marketing and product…
- Tempo Live home fitness training powered by computer vision.
2014
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Summer 2014
78 companies- MTailor Get measured by your phone in under 30 seconds for perfect fitting…
- Checkr People infrastructure for the future of work
- Alchemy Nanotechnology-enabled coatings for automotive and defence sectors
- ShipBob Providing Amazon level logistics to e-commerce businesses.
- SFOX Crypto-currency trading platform.
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Winter 2014
74 companies
2013
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Summer 2013
52 companies- Webflow Professional website design and publishing platform.
- Asseta Sourcing marketplace for semiconductor fab spare parts.
- Estimote, Inc. Location intelligence platform
- Panorama Education Improving education for every student.
- Lob Lob is the only automation platform that transforms direct mail into…
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Winter 2013
46 companies- Experiment crowdfunding platform for science
- Strikingly The easiest way to create a beautiful, mobile optimized website.
- CircuitLab Online circuit simulator and electronic schematic editor.
- Padlet Papyrus → Parchment → Paper → Padlet
- Watsi Watsi is the first global crowdfunding platform for medical…
2012
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Summer 2012
83 companies -
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Winter 2012
66 companies- Rescale High Performance Computing Built for the Cloud
- Shoptiques Shoptiques.com lets you shop the world's best local boutiques online.
- Per Vices Building Mission Critical Software Defined Radio products.
- CleverDeck Collaborate with an artist to commission original artwork you'll live…
- HireArt Gives businesses everything needed to hire & manage W2 contractors.
2011
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Summer 2011
60 companies- OneSignal Engage customers through personalized omni-channel messaging
- AgileMD Predictive analytics and clinical pathways for hospitals
- Videopixie Marketplace for Video Production Services. We help you hire the best…
- Vidyard Video for business.
- Apollo Apollo helps engineering teams accelerate delivery
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Winter 2011
45 companies- Tremendous How businesses send money to people at scale. Fast, free, global.
- Instapainting Custom-made artwork from artists e-commerce marketplace.
- Tumult Tumult is building the next generation of apps for web design. Our…
- SingleStore The cloud-native, operational database built for speed and scale.
- Storyworth Record your family stories and print them in beautiful keepsake books.
2010
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Summer 2010
36 companies- WorkFlowy WorkFlowy is a better way to manage information. It provides a simple…
- AnyList One app for stress-free shopping, cooking, and meal planning.
- Docker Software development platform.
- Recurse Center The retreat where curious programmers recharge and grow
- DemandSphere SEO & Content Marketing Intelligence
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Winter 2010
27 companies- Bitplay Effortless Video Meetings - Acquired by Jive Software in 2013
- Zencoder Video Encoding API, Open source video player (video.js)
- Embedly Embedly provides a platform and suite of tools to make embedding and previewing links simple. Embedly helps publishers and consumers mana...
- 500Friends the best loyalty and retention marketing partner for CMOs.
- Optimizely The first all-in-one operating system for marketing
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…
- Airbnb Book accommodations around the world.
- Cloudkick Cloudkick is system to manage cloud servers, such as the Rackspace Cloud and Amazon's EC2. Cloudkick provides an easy to use monitoring/...
- Picurio Picurio is web-based photo sharing and photo management software.
- Recurious thesixtyone is Digg for new music, a social filter for the tsunami of indie creativity hitting the web. Like Digg, the homepage is commun...
2008
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Summer 2008
22 companies- Poll Everywhere Interactive meetings and presentations
- Anyvite Anyvite is a free site dedicated to event invitation creation and group organization. Launched in 2008, Anyvite provides users with the m...
- Cloudant NoSQL Database-aaS. Acquired by IBM in 2014. Now IBM Cloud Data…
- Picwing Photo Sharing platform for families
- BackType BackType was an analytics company acquired by Twitter in 2011
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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.
- Joberator Joberator was formed to tackle head-on the growing challenges and connection-gap issues in the STEM employment and recruitment marketplac...
- FathomDB FathomDB offers databases as a service, taking care of many of the day-to-day tasks database administrators have to deal with and letting...
- Heroku Enabling developers to build and run applications in the cloud.
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 ...
- 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...
- SocialPicks SocialPicks was a platform where stock investors could exchange…
- Bountii Bountii is a price search startup that has built a search engine capable of finding shoppers lower and more accurate prices than any exis...
- Splashup Splashup, formerly known as fauxto, is an online image editing service that provides some advanced tools and is unique for its incorporat...
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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…
- 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.
- 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...
- Pollground Online polls.
- Likebetter An online personality test game, where you look at two photos and choose which one you “Like Better”.
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Winter 2006
7 companies- 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...
- 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 ...
- 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 ...
- TextPayMe Founded in 2005, TextPayMe is an SMS payment service that lets you send money to other people using cell phone text messaging. TextPayMe ...
- 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 ...
- Kiko We're the best online calendar solution to ever exist. Period.
