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Y Combinator

Y Combinator

Y Combinator is an American seed accelerator, started in March 2005. Twice a year YC invests in a large number of startups.


Y Combinator created a new model for funding early stage startups. Twice a year YC invests a small amount of money ($120k) in a large number of startups. The startups move to Silicon Valley for 3 months, during which YC works intensively with them to get the company 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.

Y Combinator Info Video
Y Combinator (18)

Y Combinator

Y Combinator created a new model for funding early stage startups. Twice a year we invest in a large number of startups.

Hacker News

Hacker News is a social news website focusing on computer science and entrepreneurship.

Paul Graham

Paul Graham is an English computer scientist, venture capitalist, and essayist. He is known for his work on Lisp, for co-founding Viaweb, and Y Combinator.

YC Blog

Y Combinator's official blog.

Y Combinator World

Explore YC companies by country

Startup School

Startup School is a free 10-week massively open online course (MOOC) by Y Combinator.

YC Gift Ideas

Holiday gift ideas from Y Combinator

Y Combinator Company List

Names and descriptions of companies funded by Y Combinator, a seed accelerator.

YC New Year's Buying Guide

Happy Holidays from Y Combinator! Here are products and services that could help propel your business forward in the new year.

New YC List

A new list of YC startups (S14, W14, S15)

YC Female Founder Stories

A collection of interviews with some of Y Combinator’s female alumni.

Apply to YC

The Best Resource for Writing your YC Application.

The Unofficial YC Guidebook

Are you applying to Y Combinator this cycle? Written by a YC alum, this guide is packed with strategies & tactics for submitting the strongest possible app.

Watch Me YC

99% of applicants don't get in. See hundreds of them here and help one of them get some free beer.

Sam Altman's Startup Class

How to Start a Startup is a series of video lectures, initially given at Stanford in Fall 2014.

Sam Altman Startup Playbook

To have a successful startup, you need: a great idea, a great market, a great team, a great product, and great execution.

Y Combinator Startups

Information on almost 700 startups funded by Y Combinator.

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