Bump, Flock, Photoroll (unreleased) => Google Photos
Bump was acquired by Google in 2013. The Bump and Flock apps were shut down, but our unreleased Photoroll app went on to become the basis for Google Photos, which we led from inception to more than 1…
CarWoo! is the stress-free, organized way to shop multiple dealers to get a great deal on your new car. CarWoo! was founded in 2008 by Tommy McClung and Erik Landerholm and has helped hundreds of tho…
Directed Edge delivers Amazon-like "People who bought this also bought..." and "We think you'd also like"-style recommendations to other sites, using existing data being collected such as purchase or …
FanChatter aggregates, amplifies and empowers fan content on every…
FanChatter fuels your fans so they can promote you better than any ad ever could.
Our customers are big guys (NBC Universal, Clear Channel, Gannett) and little guys (bloggers all over the world) who …
FlightCaster predicts flight delays.
FlightCaster can predict your probability of delay hours before the airline or any other app notifies you. FlightCaster uses a patent-pending algorithm that scour…
Consumer / Consumer -> Travel, Leisure and Tourism
Jason FreedmanBradford CrossEvan KonwiserJames BracyJonathan Bracy
We let you know where to go and what to get once you get there.…
At its core GraffitiGeo allows users to leave brief reviews of restaurants, or for those too lazy to do that, to simply leave a "thumbs up" or "thumbs down" — it's like a highly condensed version of Y…
Founded in 2009, HighlightCam is a YC-alum & 500Startups-funded company bent on taking over the world, one movie at a time.
HighlightCam is revolutionizing how users create (and share) movies with a …
InstantQ is an online platform that enables restaurants to distribute JIT promotions to its customers. It was launched in 2009 by Dana Levine and is based in California.
JobSpice is a surprisingly easy-to-use, intuitive online tool for creating a resume. Changing styles, managing different resumes for different employers, and creating web-based and PDF versions takes …
Listia is a new kind of auction marketplace for giving and getting free stuff. Users list items as auctions, and other users bid on these items using credits instead of money. Credits are earned by si…
Mixpanel is event analytics for builders that need answers.
Mixpanel is analytics for builders that need answers from their data at their fingertips. When everyone in the organization can see — and learn from — the impact of their work, they are poised to make…
NudgePad is an IDE for prototyping in your browser. It allows anyone to launch a fully hosted custom app in two seconds.
NudgePad removes all the pain and complication of starting a project, inclu…
The best live chat software on the planet. We help you build…
Olark is easy-to-use live chat software that lets you talk to customers on your website.
Olark can help you track leads, drive sales, increase conversions, and provide great customer service. Real…
Plurchase is an online social shopping site. From it, you can visit online shopping sites like Zappos with the additional of a social toolbar on the right hand side of the page. You can chat with othe…
RentHop (www.renthop.com) helps renters find great apartments. We use sophisticated data analysis to rank apartment listings based on their "freshness", their accuracy and completeness and the respo…
Real Estate and Construction / Real Estate and Construction -> Housing and Real Estate
RethinkDB is the first open-source scalable database for the realtime web. It exposes an exciting new access model -- instead of polling for changes, the developer can tell the database to continuousl…
Launched out of Y Combinator’s 2009 Summer batch, Stripe is a global technology company that builds economic infrastructure for the internet. Businesses of every size—from new startups to public compa…
WakeMate makes personalized alarm clocks that sync with both a user's body and their cell phone, enabling the iPhone alarm system to sound at the end of a REM cycle.
The application/ wristband system…