Y Combinator's directory lists 60 companies in the Summer 2011 batch: 14 Active, 26 Acquired, 0 Public and 20 Inactive. 33% of Summer 2011 is listed Inactive, against 23% across YC batches at least two years old, so this batch has lost more companies than most.
ActiveAcquiredPublicInactive
Statuses are Y Combinator's own listing in its public company directory, read on the date shown. YC's directory can drop companies altogether, so the Inactive counts here are a floor, not a full count of companies that stopped. Acquired and Public are as YC lists them; neither says anything about the price or the outcome for founders.
Every company in Summer 2011
| Company | What they do | Status | Team |
|---|---|---|---|
| AgileMD | Predictive analytics and clinical pathways for hospitals | Active | 19 |
| Apollo | Apollo helps engineering teams accelerate delivery | Active | 200 |
| Clerky | Makes legal paperwork easy for startups and their attorneys. | Active | 35 |
| GoCardless | We’re building the world’s bank payment network. | Active | 900 |
| HackerRank | Change the world to value skills over pedigree | Active | 300 |
| Imgix | The platform for your visual media. | Active | 34 |
| LeadGenius | LeadGenius is an account-based marketing and lead generation… | Active | 50 |
| MixRank | Data products for sales, marketing, finance, recruiting, and more. | Active | 31 |
| OneSignal | Engage customers through personalized omni-channel messaging | Active | 150 |
| Quartzy | Marketplace for life science supplies. | Active | 100 |
| Sift | The Leader in Digital Trust & Safety | Active | — |
| Streak | Streak transforms Gmail into a powerful CRM | Active | 35 |
| Videopixie | Marketplace for Video Production Services. We help you hire the best… | Active | 11 |
| Vidyard | Video for business. | Active | 201 |
| Aisle50 | Grocery deals. | Acquired | 11 |
| Automatic | Automatic connects your car to the rest of your digital life. | Acquired | 51 |
| Caviar | Uber for food. | Acquired | 51 |
| Citus Data | Real-time. Big data. PostgreSQL | Acquired | 45 |
| Clutch | An easy to integrate library for native iOS applications designed to… | Acquired | 2 |
| Codecademy | The leading online learning platform for technical skills. | Acquired | 225 |
| Compose | We make it easy to run databases. PostgreSQL, Redis, MongoDB,… | Acquired | 51 |
| Cryptoseal | Server key management, VPN as a Service, Privacy VPN. Sold to… | Acquired | 3 |
| Debteye | Automate credit counseling. | Acquired | 2 |
| Embark | Public transit apps. Acquired by Apple in 2013. | Acquired | 2 |
| Firebase | Build and grow iOS, Android, and Web apps. | Acquired | 500 |
| Fobo | Sell to people nearby. | Acquired | 2 |
| Freshplum | Analytics with action | Acquired | 8 |
| Genius | Music Intelligence | Acquired | 101 |
| GlassMap | Location sharing. Acquired by Groupon in 2013. | Acquired | 11 |
| Launchpad Toys | Creativity at Play. Tablet toys. Acquired by Google, 2015. | Acquired | 2 |
| Pagelever | Facebook analytics. Acquired by Unified in January 2013. | Acquired | 11 |
| Parse | Parse is the easiest way to build apps. | Acquired | 11 |
| Perfect Audience | Self-service display advertising for SaaS and online retail. | Acquired | 11 |
| Realm | Better data structures = no DB. | Acquired | 51 |
| Science Exchange | Powering scientific outsourcing | Acquired | 50 |
| Segment | Software and APIs to collect, clean, and control customer data. | Acquired | 550 |
| Stypi | Realtime collaborative coding | Acquired | 2 |
| TapEngage | Touch-friendly marketing, acquired by Dropbox | Acquired | 2 |
| Verbling | Language learning through video chat. | Acquired | 2 |
| Zeus | Tech-enabled property manager focused on corporate rentals; Acquired… | Acquired | 200 |
| Draft | Making Draft. Super simple version control and collaboration for… | Inactive | 1 |
| Dubjoy | Dubjoy translates and voice-overs your video to any language | Inactive | 2 |
| Everyme | The #1 private social network | Inactive | 2 |
| Hungry Labs | Now part of Snaplayer. | Inactive | 2 |
| Interstate | Create & Share Product Roadmaps | Inactive | 2 |
| Kicksend | Send and print photo albums with people you love. Acquired by Lyft | Inactive | 11 |
| Leaky | Online auto and business insurance. (Acquired 2013) | Inactive | 2 |
| MarketBrief | Generate stories from SEC filings. | Inactive | 2 |
| Opez | Yelp for service pros. | Inactive | 11 |
| PayDragon | Hyperlinking the real world. | Inactive | 11 |
| PhoneSys | The Phone System for Sales Teams. | Inactive | 4 |
| Picplum | Inactive | 2 | |
| Proxino | Javascript proxy. | Inactive | — |
| Quad | Quad is where college students get things done. | Inactive | 12 |
| Rentobo | The easiest way to find a tenant. Rentobo is a tool that makes it… | Inactive | 11 |
| Ridejoy | Long-distance carpooling marketplace. Shut down in early 2013. | Inactive | 11 |
| Snapjoy | Photo library. | Inactive | 11 |
| Vapor | In-video advertising. | Inactive | 2 |
| Zenbox | Brings dozens of SaaS's (Mailchimp, Stripe, Shopify, Salesforce,… | Inactive | 2 |
| Zigfu | Layer above Kinect. | Inactive | 2 |
How this is measured
Measured 2026-09-26 from Y Combinator's company directory. Team size is the number YC lists for the company, where it lists one. Survival here means listed Active; Acquired and Public are shown separately because YC's listing does not say whether an acquisition was a good outcome.
All batchesShut-down companies
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