Demo day

Y Combinator

Type	Limited liability company
Industry	Venture capital
Founded	March 2005
Founder	Paul Graham, Jessica Livingston, Robert Morris, Trevor Blackwell
Headquarters	Mountain View, California, United States
Number of locations	2 offices (2014)
Key people	Paul Graham, Jessica Livingston, Robert Morris, Trevor Blackwell, Sam Altman, Paul Buchheit, Dalton Caldwell, Kate Courteau, Jared Friedman, Kevin Hale, Aaron Harris, Justin Kan, Carolynn Levy, Jon Levy, Kat Manalac, Kirsty Nathoo, Geoff Ralston, Michael Seibel, Qasar Younis, Brian Chesky, Adora Cheung, Patrick Collison, Drew Houston, David Rusenko, Emmett Shear, Ilya Sukhar, Joe Gebbia, Elizabeth Iorns, Andrew Mason, Peter Thiel, Ben Silbermann, Anne Wojcicki.
Products	Investments
Website	www.ycombinator.com

Y Combinator is an American seed accelerator, started in March 2005. In 2017 Forbes ranked YC one of two "Platinum Plus Tier U.S. Accelerators".Fast Company has called YC "the world's most powerful start-up incubator".Fortune has called Y Combinator "a spawning ground for emerging tech giants".

In its main program, Y Combinator interviews and selects two batches of companies per year. The companies receive seed money, advice, and connections in exchange for 7% equity. The program includes "office hours", where startup founders meet individually and in groups with Y Combinator partners for advice. Founders also participate in weekly dinners where guests from the Silicon Valley ecosystem (successful entrepreneurs, venture capitalists, etc.) speak to the founders.

Y Combinator’s motto is "Make Something People Want." The program aims to focus the founders on further developing their product, team and market, refining their business model, achieving product/market fit, and scaling the startup into a high growth business, etc. The program culminates at Demo Day where startups present their business to a selected audience of investors.

As of 2017, Y Combinator had invested in ~1,450 companies including Dropbox, Airbnb, Coinbase, Stripe, Reddit, Zenefits, BuildZoom, Instacart, Twitch.tv, Machine Zone, Weebly, Paribus, and Chinese startup Raven Tech. The combined market capitalization of YC companies was over $80B.