What they do:
World's largest online library.
Quick facts:
HQ: San Francisco, CA, United States
Y Combinator Summer 2006 Startups
This list has 10 startups and was last updated on Oct 15, 2026. Biggest hubs: San Francisco (5) and Boston (2). Largest teams: Scribd, OMGPop, and Xobni.
10 startups
OMGPop
Acquired
What they do:
An independent flash game studio.
Quick facts:
HQ: New York, NY, United States
Xobni
Acquired
What they do:
Xobni makes your inbox and address book smarter. Xobni, and its Smartr product suite, discover all the people you've ever emailed, called or SMS'd, and…
Quick facts:
HQ: San Francisco, CA, United States
Zanbazaar
Shut down
What they do:
Community-curated catalogs for product recommendations
Quick facts:
HQ: Boston, MA, United States
Shoutfit
Shut down
What they do:
We tried to build a social network around clothing. Also briefly built a search engine for clothing.
Quick facts:
HQ: San Francisco, CA, United States
Jamglue
Shut down
What they do:
Jamglue is an online community allowing users to listen or mix music from a library of user-contributed music.
Quick facts:
HQ: Seattle, WA, United States
Likebetter
Shut down
What they do:
An online personality test game, where you look at two photos and choose which one you “Like Better”.
Quick facts:
HQ: San Francisco, CA, United States
Jumpchat
Shut down
What they do:
A platform bridging mobile text messages, email, and IM communication without needing to download anything. Users can send mass messages on any of the…
Quick facts:
HQ: San Francisco, CA, United States
Pollground
Shut down
What they do:
Online polls.
Quick facts:
HQ: Boston, MA, United States
YC S06Early stage
Thinkature
Shut down
Quick facts:
YC S06Early stage
Questions and answers
How many startups are on this list?
There are 10 startups on this list, last updated on Oct 15, 2026.
Which of them are hiring?
None of them shows open roles right now.
Which of them have the largest teams?
By team size: Scribd (300 employees), OMGPop (11 employees), and Xobni (11 employees).
Where are they based?
The biggest hubs are San Francisco (5) and Boston (2).