Companies60
Active20%
Acquired or public47%
Inactive33%
Y Combinator's directory lists 60 companies in the Summer 2011 batch: 12 Active, 28 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.
What the directory lists about Summer 2011
- By the industry YC files each company under: B2B 30, Consumer 18, Fintech 4, Education 3, Healthcare 3, Real Estate and Construction 2.
- Where 60 of the 60 companies say they are based, by the first location each lists: San Francisco, CA, USA (34), San Francisco (12), New York City, NY (6), Chicago, IL, USA (3), Boulder, CO, USA (1), Kitchener, ON, Canada (1), London, England, United Kingdom (1), Los Angeles, CA, USA (1), and 1 other place.
- YC marks 2 companies from this batch as top companies: Codecademy and Segment.
- Earlier names on the entries: Apollo (earlier Meteor and Apollo M); Compose (earlier MongoHQ); Draft (earlier Cityposh); Dubjoy (earlier DoubleRecall); Everyme (earlier Origami); Fobo (earlier Yardsale); HackerRank (earlier Interviewstreet); LeadGenius (earlier MobileWorks); OneSignal (earlier Hiptic); PayDragon (earlier Paperlinks); PhoneSys (earlier Pingm and PhoneSys (Pingm)); Picplum (earlier Terminal 49); Quad (earlier CampusCred); Sift (earlier Sift Science); Vapor (earlier Askolo); and 2 more.
- Status changes seen since tracking began on September 26, 2026: GoCardless, Active to Acquired (seen October 21, 2026); Clerky, Active to Acquired (seen October 1, 2026).
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 |
| 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 |
| Clerky | Makes legal paperwork easy for startups and their attorneys. | Acquired | 35 |
| 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 |
| GoCardless | We’re building the world’s bank payment network. | Acquired | 900 |
| 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 2026-11-10 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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