CoderWall
Acquired
What they do:
Coderwall is a collaborative learning platform for software developers to improve their programming knowledge. It is based in San Francisco, California.
Quick facts:
HQ: San Francisco, CA, United States
Y Combinator Winter 2012 Startups
This list has 66 startups and was last updated on Oct 15, 2026. 5 of them are hiring right now. Biggest hubs: San Francisco (46), New York (5), and Boston (3). Largest teams: Gusto, Wave, and Amplitude. Latest round: CircuitHub raised $25.5M (May 13, 2026).
66 startupsPage 2 of 2
Midnox
Acquired
What they do:
Luma (formerly Midnox) allows you to record and share beautiful HD videos with real-time video stabilization, filters and zoom. Change filters and…
Quick facts:
HQ: San Francisco, CA, United States
Socialcam
Acquired
What they do:
The easiest way to share videos with friends and family.
Quick facts:
HQ: San Francisco, CA, United States
YC W12Early stage
LendUp
Shut down
What they do:
LendUp is a socially responsible company on a mission to redefine…
Quick facts:
HQ: San Francisco, CA, United States
The Muse
Shut down
What they do:
The Muse is values-based job search & hiring for 7M+ monthly
Quick facts:
HQ: New York, NY, United States
Make School
Shut down
What they do:
Make School is redesigning college for the 21st century. Students…
Quick facts:
HQ: San Francisco, CA, United States
Tap to Learn
Shut down
What they do:
Games For Education
Quick facts:
HQ: San Francisco, CA, United States
Optilly/Installmonetizer
Shut down
What they do:
Fb ad optimization platform
Quick facts:
HQ: San Francisco, CA, United States
Grouper
Shut down
What they do:
We set up drinks between 2 groups of friends: 3 guys and 3 girls.
Quick facts:
HQ: New York, NY, United States
Ark
Shut down
What they do:
Ark organizes the world's social information.
Quick facts:
HQ: San Francisco, CA, United States
Marft
Shut down
What they do:
Marft creates embeddable machine learning models for application…
Quick facts:
WireOver
Shut down
What they do:
Really secure file sending for big files.
Quick facts:
HQ: Boston, MA, United States
Hipmob
Shut down
What they do:
Customer communication for iOS and Android developers - an in-app…
Quick facts:
HQ: Boston, MA, United States
Couple
Shut down
What they do:
App that connects two phones and creates a private timeline to share…
Quick facts:
HQ: San Francisco, CA, United States
Minefold
Shut down
What they do:
Simple multiplayer game servers.
Quick facts:
HQ: San Francisco, CA, United States
Talkray (TiKL)
Shut down
What they do:
Instantly talk or text to one or a group of friends at once with the…
Quick facts:
HQ: San Francisco, CA, United States
Zillabyte
Shut down
What they do:
Palantir for sales people
Quick facts:
HQ: San Francisco, CA, United States
LVL6
Shut down
What they do:
We make mobile MMOs.
Quick facts:
HQ: San Francisco, CA, United States
99dresses
Shut down
What they do:
We're creating every women's fantasy by combining the unwanted…
Quick facts:
HQ: New York, NY, United States
Glider
Shut down
What they do:
We filter distracting emails away from your inbox.
Quick facts:
HQ: Portland, OR, United States
Carsabi
Shut down
What they do:
Carsabi is the search engine for used cars
Quick facts:
HQ: San Francisco, CA, United States
Jellyfish Art
Shut down
What they do:
Jellyfish Art makes jellyfish aquariums and supplies them with live jellyfish and accessories. Jellyfish are a new trend in personal aquariums. They require…
Quick facts:
HQ: San Francisco, CA, United States
GiveSpark
Shut down
What they do:
Givespark was a celebrity charity fundraising platform
Quick facts:
HQ: San Francisco, CA, United States
BookSolid
Shut down
What they do:
BookSolid is the opentable for tour operators.
Quick facts:
YC W12Early stage
Zipio
Shut down
What they do:
Deal search service
Quick facts:
YC W12Early stage
Pixelapse
Shut down
What they do:
Github for designers. We automatically keep track of revisions of…
Quick facts:
HQ: San Francisco, CA, United States
YC W12Early stage
Brace
Shut down
What they do:
Backlift allows front-end only developers to build entire websites…
Quick facts:
HQ: San Francisco, CA, United States
YC W12Early stage
BarSense
Shut down
What they do:
Kid's first smartphone with web-based parental controls.
Quick facts:
HQ: San Francisco, CA, United States
YC W12Early stage
Documents.Me
Shut down
What they do:
Client-side encryption for your devices and the cloud.
Quick facts:
HQ: San Francisco, CA, United States
YC W12Early stage
SolidStage
Shut down
What they do:
Sysadmin as a service. We make deploying, configuring, monitoring,…
Quick facts:
YC W12Early stage