YC companies funded in 2009

Batches in 2009

• Summer 2009 — 26 companies
• Winter 2009 — 16 companies

All 2009 YC companies by team size

• Stripe (Summer 2009 · 7000 people) — Economic infrastructure for the internet.
• Airbnb (Winter 2009 · 6132 people) — Book accommodations around the world.
• Mixpanel (Summer 2009 · 410 people) — Mixpanel is event analytics for builders that need answers.
• WePay (Summer 2009 · 400 people) — Payments for platform businesses.
• Bump (Summer 2009 · 30 people) — Bump, Flock, Photoroll (unreleased) => Google Photos
• Olark (Summer 2009 · 28 people) — The best live chat software on the planet. We help you build…
• Volantio (Winter 2009 · 19 people) — Post-booking revenue and capacity optimization for airlines…
• HighlightCam (Summer 2009 · 11 people) — HighlightCam edits video, automatically!
• CarWoo (Summer 2009 · 11 people) — The best way to buy a new car.
• Foodoro (Winter 2009 · 11 people)
• Heyzap (Winter 2009 · 11 people) — Heyzap (acquired by Fyber for $45m in 2016) is one of the largest…
• RethinkDB (Summer 2009 · 11 people) — The open source database for the realtime web.
• Jobspice (Summer 2009 · 11 people)
• Fanchatter (Summer 2009 · 11 people) — FanChatter aggregates, amplifies and empowers fan content on every…
• Lockitron (Summer 2009 · 11 people) — Lockitron makes electronic locks you can control locally from your…
• Cloudkick (Winter 2009 · 11 people)
• RentHop (Summer 2009 · 9 people) — Apartment rental marketplace
• Listia (Summer 2009 · 6 people) — Mobile marketplace for trading used goods.
• Divvyshot (Winter 2009 · 2 people)
• GraffitiGeo (Summer 2009 · 2 people) — We let you know where to go and what to get once you get there.…
• Flightcaster (Summer 2009 · 2 people)
• Wakemate (Summer 2009 · 2 people)
• Instantq (Summer 2009 · 2 people)
• Echodio (Winter 2009 · 2 people) — Sync and stream your music across any device. Acquired in 2009.
• Directed Edge (Summer 2009 · 2 people) — Product recommendations.
• Plurchase (Summer 2009 · 2 people)
• NudgePad (Summer 2009 · 2 people) — Online IDE. We joined Microsoft in 2014.
• Lingt (Summer 2009 · 2 people) — Lingt provided a web-based platform for learning languages leveraging…
• Picurio (Winter 2009 · 2 people)
• DailyBooth (Summer 2009 · 2 people)
• Skysheet (Winter 2009 · 2 people) — Browser-based spreadsheet.
• Voxli (Winter 2009 · 2 people)
• PetaSales (Winter 2009 · 2 people)
• reMail (Winter 2009 · 1 people) — Email search for iPhone. Acquired by Google in Feb 2010.
• Nambii (Winter 2009)
• Recurious (Winter 2009)
• RoboHR (Summer 2009)
• Wattvision (Winter 2009) — Sensors and software for energy tracking. Like 'fitbit' for your…
• AdThrow (Summer 2009)
• Stackq (Summer 2009)
• Tuxebo (Summer 2009) — Tuxebo was a platform for renting things
• Spaces Life (Winter 2009)