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- Cignara AI Customer Support for Fortune 500-scale enterprises
- Arzana Adaptive AI built for manufacturers
- HEVN, inc Cross-border payments for exporters of physical goods.
- Arga Labs Real-world sandboxes to test and train AI agents
- CharacterQuilt Computer use agents to deploy enterprise marketing campaigns
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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- Sim Build autonomous AI agents for enterprise systems
- Cactus All-In-One AI Growth Partner. Built for Trades.
- Units Units builds full-stack AI education infrastructure.
- sieve AI + human review to solve data cleaning - accessible via API or Excel
- Better Auth The authentication framework for TypeScript
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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- Bluedot Bluedot is a single payment platform for EV drivers and fleets.
- Coperniq Workflow software for solar & energy contractors ☀️😎
- Salient AI Servicing for Auto Lenders
- Untether Labs Scheduling software for digital health clinics to do more with less.
- Sherloq One place for all your queries, directly on your SQL editor
2022
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Summer 2022
233 companies- EthosX The protocol for derivatives on blockchains
- FlatX AI-Powered Rental Platform for Urban Renters
- Avina GTM signals engine for sales teams. Automate warm outbound with AI.
- Diversion A scalable, cloud-native Perforce and Git alternative
- Overwatch Enterprise software for enterprise risk and cyber fraud intelligence
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Winter 2022
398 companies- Airwork On-demand labour that's actually good
- Joon Health Pediatric digital therapeutic for the +100M families in the US
- Avocademy We teach UX/UI design and then help people get great jobs.
- Hyperbeam API for shared embeddable web browsers
- Armilla AI Liability insurance for generative AI and AI Agents
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- WareIQ Amazon-prime like logistics for eCommerce companies in India
- Jeeves International banking infrastructure for global startups.
- Osmind Platform for breakthrough mental health research and treatment
- twoplus fertility An effective home-use fertility treatment for natural conception
- Kingdom Clinically-validated ingredients from natural microbes
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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.
- Switchboard Technology for Trucking
- Latchel 24/7 emergency maintenance department for property managers and…
- Mars Auto Autonomous trucks to fully automate long-haul freight shipping
- Alpaca API-first stock and crypto brokerage platform
2018
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Summer 2018
131 companies- Cowrywise Digitizing wealth management in Africa
- Mutiny Your AI agent for creating anything customer-facing, in minutes.
- Curebase Modern, AI-powered clinical trial software platform.
- Kunduz Kunduz provides instant answers to students' questions and makes…
- Inscribe AI Document Fraud Detection for Banks, Credit Unions & Lenders
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Winter 2018
146 companies
2017
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Summer 2017
125 companies- SafeButler Your chief servant for shopping insurance
- Rabbet The financial foundation for every real estate development decision
- Relationship Hero Dating & relationship coaching sessions for individuals and couples
- FollowUpThen FollowUpThen is an email-based personal assistant that sends you…
- Flock Safety The first public safety operating system that eliminates crime.
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Winter 2017
116 companies
2016
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Summer 2016
102 companies- Ready Education Ready Education is building the mobile OS for higher education. We…
- Upgraded Upgraded helps retailers and carriers sell devices on subscription.
- Joy The platform for all your life events.
- SmartPath Financial wellness for the middle class
- RocketLit RocketLit is an adaptive learning and assessment platform.
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Winter 2016
122 companies- SOUNDBOKS We're creating the loudest battery-driven speaker on the market
- Petcube Petcube is on the mission to improve lives of pets and pet owners…
- HistoWiz Accelerating Histopathology for Cancer Research
- Sendbird The AI agent that doesn’t just support, it delights.
- Mason Mason is the fastest way to take smart devices from idea to end user
2015
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Summer 2015
104 companies -
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Winter 2015
110 companies- Mezmo Observability platform to control all of your log data
- Sails Co. Full-service web, mobile, & cloud studio providing professional…
- Flip Community-driven marketplace for sneakers.
- ReadMe Beautiful, personalized, interactive developer hubs
- BuildScience The operating system for commercial buildings.
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…
- Dyspatch AI Email Production - Emails on brand, guaranteed to work, fast.
- Guesty The management platform for the short term rental industry.
- Flexport Platform for global logistics.
- Noora Health Training patients and their families with health skills
2013
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Summer 2013
52 companies- Lob Lob is the only automation platform that transforms direct mail into…
- Estimote, Inc. Location intelligence platform
- Panorama Education Improving education for every student.
- Webflow Professional website design and publishing platform.
- Asseta Sourcing marketplace for semiconductor fab spare parts.
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Winter 2013
46 companies- Experiment crowdfunding platform for science
- SimplyInsured We sell health insurance to small businesses 100% online.
- Watsi Watsi is the first global crowdfunding platform for medical…
- Strikingly The easiest way to create a beautiful, mobile optimized website.
- InfluxData The platform for building and operating time series applications.
2012
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Summer 2012
83 companies- Flightfox A platform to plan, book and manage global and group travel.
- Submittable The best way to launch, manage and measure social impact programs
- Rainforest no-code end-to-end testing that integrates with any CI/CD pipeline
- ClassDojo Communication app for K-8 teachers, kids, and families
- Plivo Voice AI Agents for customer engagement, including WhatsApp, SMS &…
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Winter 2012
66 companies- Shoptiques Shoptiques.com lets you shop the world's best local boutiques online.
- CircuitHub On-Demand Electronics Manufacturing
- CleverDeck Collaborate with an artist to commission original artwork you'll live…
- HireArt Gives businesses everything needed to hire & manage W2 contractors.
- Medigram We are making a HIPAA-compliant, Groupme app for doctors to…
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.
- SingleStore The cloud-native, operational database built for speed and scale.
- Tumult Tumult is building the next generation of apps for web design. Our…
- Zerocater Zerocater is revolutionizing how companies feed their employees
- Tremendous How businesses send money to people at scale. Fast, free, global.
2010
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Summer 2010
36 companies -
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Winter 2010
27 companies
2009
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Summer 2009
26 companies- Listia Mobile marketplace for trading used goods.
- Olark Olark gives you an AI agent that works your marketing funnel 24/7
- Lingt Lingt provided a web-based platform for learning languages leveraging…
- Mixpanel Mixpanel is event analytics for builders that need answers.
- Directed Edge Product recommendations.
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Winter 2009
16 companies
2008
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Summer 2008
22 companies -
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Winter 2008
21 companies
2007
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Summer 2007
19 companies -
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Winter 2007
14 companies
2006
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Summer 2006
10 companies -
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Winter 2006
7 companies
2005
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Summer 2005
8 companies