Y Combinator is a premier startup accelerator that turns builders into formidable founders. Since 2005, it has funded thousands of companies using a batch model. YC invests $500,000 on standard terms ($125k for 7% and a $375k MFN safe) and runs intensive three-month programs in San Francisco. Founders benefit from expert mentorship, weekly talks, and Bookface—a private platform for the massive alumni network. YC provides lifelong support, helping startups scale from idea to IPO.

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OpenAI valuation by Sam Altman
Coinbase public valuation 2021