Y Combinator Team at Y Combinator, Mountain View, California, United States — verified investor profile. See sector focus, stage focus and contact routes.
Y Combinator is a US-based startup accelerator founded in 2005 by Paul Graham, Robert Morris, Trevor Blackwell, and Jessica Livingston to help early-stage companies launch through mentorship, funding, and network access. The firm invests primarily at the seed stage across diverse sectors including FinTech, Artificial Intelligence, E-commerce, Healthcare, SpaceTech, and GovTech, with no strict geographic limitation beyond its Silicon Valley program base. It offers a standardized $500,000 investment per company—$125,000 for 7% equity plus a $375,000 uncapped SAFE—and typically acts as the initial lead investor before startups pitch to venture capitalists at Demo Day. Notable portfolio companies include Airbnb, Dropbox, Stripe, and Reddit, which collectively helped YC fund over 5,000 companies with a combined valuation of $800 billion as of 2025. A distinctive aspect of Y Combinator’s approach is its emphasis on team dynamics over founder credentials, as research shows observable backgrounds explain less than 4% of funding variation among its startups. The organization also maintains public writing through its FAQ and founder essays, notably clarifying t
Every field above is read from the StartupFundraising investor directory — disclosed location, recorded investments and stated focus — and re-checked as filings arrive. Founders pair it with investors in Mountain View when building a target list.
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