Y Combinator's directory lists 26 companies in the Summer 2009 batch: 7 Active, 7 Acquired, 0 Public and 12 Inactive. 46% of Summer 2009 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 2009
- By the industry YC files each company under: Consumer 12, B2B 9, Fintech 2, Real Estate and Construction 2, Education 1.
- Where 24 of the 26 companies say they are based, by the first location each lists: San Francisco, CA, USA (15), San Francisco (6), London, England, United Kingdom (1), Minneapolis, MN, USA (1), New York City, NY (1).
- YC marks 3 companies from this batch as top companies: Mixpanel, Stripe and WePay.
- Earlier names on the entries: Lockitron (earlier Apigy); NudgePad (earlier Togster); Tuxebo (earlier Souper, Alga Mater, SSuper, Dibble and Alphacare).
Every company in Summer 2009
| Company | What they do | Status | Team |
|---|---|---|---|
| Directed Edge | Product recommendations. | Active | 2 |
| Lingt | Lingt provided a web-based platform for learning languages leveraging… | Active | 2 |
| Listia | Mobile marketplace for trading used goods. | Active | 6 |
| Mixpanel | Mixpanel is event analytics for builders that need answers. | Active | 410 |
| Olark | Olark gives you an AI agent that works your marketing funnel 24/7 | Active | 15 |
| RentHop | Apartment rental marketplace | Active | 9 |
| Stripe | Economic infrastructure for the internet. | Active | 7000 |
| Bump | Bump, Flock, Photoroll (unreleased) => Google Photos | Acquired | 30 |
| DailyBooth | Acquired | 2 | |
| Flightcaster | Acquired | 2 | |
| GraffitiGeo | We let you know where to go and what to get once you get there.… | Acquired | 2 |
| Lockitron | Lockitron makes electronic locks you can control locally from your… | Acquired | 11 |
| RethinkDB | The open source database for the realtime web. | Acquired | 11 |
| WePay | Payments for platform businesses. | Acquired | 400 |
| AdThrow | Inactive | — | |
| CarWoo | The best way to buy a new car. | Inactive | 11 |
| Fanchatter | FanChatter aggregates, amplifies and empowers fan content on every… | Inactive | 11 |
| HighlightCam | HighlightCam edits video, automatically! | Inactive | 11 |
| Instantq | Inactive | 2 | |
| Jobspice | Inactive | 11 | |
| NudgePad | Online IDE. We joined Microsoft in 2014. | Inactive | 2 |
| Plurchase | Inactive | 2 | |
| RoboHR | Inactive | — | |
| Stackq | Inactive | — | |
| Tuxebo | Online marketplace for equipment rental | Inactive | 3 |
| Wakemate | 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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