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Michael Seibel

Individual

Partner Emeritus at Y Combinator, former CEO of YC Startup Accelerator (2016-2024). Co-founder of Justin.tv/Twitch and Socialcam. First African-American partner at YC.

San Francisco, United States · 8+ investments · 7 portfolio companies

Pre-Seed
Early Stage
Developer Tools
Fintech
Healthcare
Headquarters
San Francisco, United States
Website
michaelseibel.com
Portfolio Companies
7
Total Investments
8
Last Investment
Sep 2025
Geographic Focus
United States

Investment Thesis

Early-stage angel investing in pre-seed and seed startups across consumer, SaaS, fintech, and developer tools, leveraging YC network and founder experience with Twitch and Socialcam.

Michael Seibel is an Individual based in San Francisco, United States. It has made 8 investments in Developer Tools and Fintech, including Ingressive Capital, Emerge Career and Promoted.ai.

Portfolio7

Co-investors24

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24 co-investors across 28 shared portfolio companies — who they back alongside, and how often they lead.

Venture Capital ×18 · Individual ×2 · Corporate VC ×1 · 26 shared rounds

Investment History

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