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Co-founder of Justin.tv — the company that became Twitch — and CEO of Y Combinator's core accelerator from 2016 to 2023, Seibel has shaped thousands of startups while becoming Silicon Valley's most prominent advocate for Black and underrepresented founders.
Michael Seibel is a Partner Emeritus at Y Combinator, where he was a partner from 2013 and served as CEO of the core accelerator from 2016 to 2023, overseeing thousands of funded companies.
He co-founded Justin.tv (which pivoted to become Twitch, acquired by Amazon for $970 million) and Socialcam (acquired by Autodesk), and is a prolific advocate for underrepresented founders in technology.
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