Summer 2009
26 companies in this batch
Y Combinator runs two batches per year—Winter and Summer—each funding around 200 startups. This page lists every company from the Summer 2009 batch, sourced from YC's public data. Click any company to see founder details including LinkedIn profiles. Use our MCP server to query this data directly from Claude or other AI assistants.
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Scorecard Ratings:
Repeat Founder(19)
Highly Technical(55)
Deep Industry Exp(45)
Top Companies
Mixpanel
Stripe
WePay
All Companies
AdThrow
Bump
CarWoo
DailyBooth
Directed Edge
Fanchatter
Flightcaster
GraffitiGeo
HighlightCam
Instantq
Jobspice
Lingt
Listia
Lockitron
NudgePad
Olark
Plurchase
RentHop
RethinkDB
RoboHR
Stackq
Tuxebo
Wakemate