YC Directory

Discover YC companies by batch, industry, region, and size, as well as Black, Latinx, and women founders.

YC Startup Library

15 years of YC knowledge and advice on entrepreneurship.

YC companies + COVID-19

YC companies helping with the COVID-19 crisis that need your support.
Slideshow of founders and startups at Y Combinator.

Y Combinator created a new model for funding early stage startups.

Twice a year we invest a small amount of money ($125k) in a large number of startups.

We work intensively with the companies for three months, to get them into the best possible shape and refine their pitch to investors. Each cycle culminates in Demo Day, when the startups present their companies to a carefully selected, invite-only audience.

But YC doesn't end on Demo Day. We and the YC alumni network continue to help founders for the life of their company, and beyond.

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Since 2005, we've funded over 2,000 startups.

Y Combinator is a community of over 4,000 founders.

Our companies have a combined valuation of over $100B.

Stripe
Airbnb
DoorDash
Dropbox
Coinbase
Instacart
Ginkgo Bioworks
Gusto
Flexport
Rappi
Brex
GitLab
Checkr
PagerDuty
Segment
Podium
Scale AI
Faire
Twitch
Weave
Amplitude
PlanGrid
Mixpanel
Benchling
Boom
Front
Cruise
Optimizely
Meesho
LendUp
MessageBird
MBX
Standard Cognition
Embark Trucks
The Athletic
SendBird
Helion
Lattice
Zapier
Scribd
GoCardless
Razorpay
Rescale
Relativity Space
EquipmentShare
Newfront Insurance
Ironclad
InfluxData
People.ai
xendit
matterport
Webflow
Sift
Easypost
Rippling
Weebly
CoreOS
ClearTax
Clever
Heroku
Lever
Lob
Rigetti
Docker
Paystack
Duffel

See all companies Top 100 companies Work at a YC company

Female Founders Stories, a collection of interviews with some of Y Combinator’s female alumni

Read about Tracy Young, Founder of PlanGrid (YC W12) on Female Founder Stories


Also visit Elpha, a site for women in tech

Marc Andreessen

"Y Combinator is the best program for creating top-end entrepreneurs that has ever existed."

Marc Andreessen, General Partner, Andreessen Horowitz
Patrick Collison

"I doubt that Stripe would have worked without YC. It's that simple. Acquiring early customers, figuring out who to hire, closing deals with banks, raising money -- YC's partners were closely involved and crucially helpful."

Patrick Collison, Founder, Stripe (YC S09)
Julia Hartz

"I've been fortunate to engage with the YC community at past events over the last few years, and always walk away impressed with the passion and caliber of talent that YC brings together."

Julia Hartz, Co-Founder & CEO, Eventbrite

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