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What is Y Combinator?

Y Combinator is an American seed accelerator launched in March 2005 and was used to launch over 2,000 companies including Dropbox, Airbnb, Stripe, Reddit, Optimizely, Zenefits, Docker, DoorDash, Mixpanel, Heroku.

Do you use Y Combinator?

Startup communities•Fundraising resources

Recent Launches

YC Library The new hub for YC's startup videos, essays, podcasts & more

Launched on August 18th, 2023

The YC Founder Directory Discover the 9,000 founders who went through YC

Launched on January 5th, 2023

Launch YC The launchpad for YC startups

Launched on June 30th, 2022

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Alternatives

Amazon

145 reviews

Ecommerce platforms

The Y Combinator Database

54 reviews

2 reviews

Review Y Combinator?

4.82/5 based on 51 reviews

View all reviews

Maker reviews

Kevin William David used this to build

Mentara

(349 points)

To every YC founder recommended for follow-up funding

1mo ago

Ben Lang used this to build

Mentara

(355 points)

Just a great source for Entrepreneurial Greatness.

2mo ago

Ozgun Erdogan used this to build

Ubicloud (YC W24)

(608 points)

YC changed our lives. Speaking for myself, I had no idea how to do a start-up when we went through YC the first time around with Citus Data. YC has also been instrumental for Ubicloud, so wanted to give a shoutout.

5mo ago

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Reviews

Michael Mammone

•5 reviews

I've been a huge fan of YC for over a decade. Paul Graham's essays alone are a treasure of information. In addition to being one of the best funds of all time, they are constantly creating great content for entrepreneurs. Our company used their free Safe note templates for pre-seed investors. I've consumed many YT videos and even more blog posts and tweets.

3mo ago

Shobhit Sharma

•1 review

Amazing resource for thinking "Startup"

1yr ago

Lena Cohen

•20 reviews

Applied for the co-founder network. Have been wanting to apply for the YC for a long time. Hoping it will happen soon:) The online courses and learning materials on the platform are AMAZING

1yr ago