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Y Combinator Summer 2009

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Companies in Y Combinator's Summer 2009 batch.

Mixpanel
Always-on product intelligence that tells teams what to do next.
Listia
Earn points by selling things you don't need and use them to get things you want.

Stripe
Economic infrastructure for internet businesses, powering $1.9T in payments in 2025.
GraffitiGeo

RentHop
RethinkDB

Olark
Built for the marketer doing five jobs at once — Olark's AI agent answers questions, qualifies visitors, and knows exactly when to bring in
Fanchatter

Directed Edge
E-commerce recommendations for Shopify stores.

Y Combinator Summer 2009 | Cosign