Michael Seibel
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.
Michael Seibel is headquartered in San Francisco, United States, has 8 recorded investments, and includes 7 companies in its recorded portfolio.
- Headquarters
- San Francisco, United States
- Website
- michaelseibel.com
- Portfolio Companies
- 7
- Total Investments
- 8
- Last Investment
- Sep 2025
- Geographic Focus
- United States
Indexed holds 7 portfolio companies and 8 funding rounds for this investor. The full record is or through the API.
Investment Thesis
Michael Seibel is an Individual based in San Francisco, United States. It has made 8 investments, including Ingressive Capital, Emerge Career and Promoted.ai. Focus areas include Developer Tools and Fintech.
Portfolio7
Co-investors24
Sign up to view co-investors
24 co-investors across 28 shared portfolio companies — who they back alongside, and how often they lead.
Venture Capital ×17 · Individual ×2 · Accelerator ×1 · 26 shared rounds
Investment History
Sign up to view investment history
Create a free account with 25 free credits every month, no card needed, to unlock deal history, amounts, and round details.
Your firm? Embed this profile
Add the live badge to your site — it stays current as your portfolio data updates.
<a href="https://indexed.vc/investors/michael-seibel"><img src="https://indexed.vc/api/badge/investor/michael-seibel" alt="Michael Seibel on Indexed.vc" width="260" height="76" /></a>