Michael Seibel is an American entrepreneur and venture capitalist, best known for his work as a partner and president at Y Combinator (YC), a prominent startup accelerator. He has co‑founded several technology companies and has been involved in the early-stage financing and mentorship of numerous startups.
Early life and education
Seibel was raised in the United States. He earned a Bachelor of Arts degree in Computer Science from Yale University, where he also pursued studies in economics.
Career
Early ventures
- Justin.tv (2007–2014): Seibel co‑founded Justin.tv, a platform that allowed users to broadcast live video streams. The service later spun off the video‑sharing site Twitch, which was acquired by Amazon in 2014 for approximately $970 million.
- Socialcam (2011–2012): Seibel co‑founded Socialcam, a mobile video sharing application. The company was acquired by Autodesk in 2012 for a reported $60 million.
Y Combinator
- Seibel joined Y Combinator as a part‑time partner in 2013 and became a full‑time partner in 2014. He has served as President of Y Combinator, overseeing the accelerator’s batch programs, mentor network, and investment activities.
- At YC, Seibel has led the investment committee, selected and mentored founding teams, and contributed to the development of YC’s curriculum and community initiatives. Notable companies from YC batches that he helped guide include Dropbox, Reddit, and Instacart.
Board and advisory roles
Seibel sits on the boards of several YC‑backed companies and has acted as an advisor for early‑stage startups across sectors such as software, artificial intelligence, and consumer internet.
Public speaking and advocacy
He is a frequent speaker at technology conferences and universities, discussing entrepreneurship, startup culture, and diversity in tech. Seibel has advocated for greater inclusion of underrepresented founders within the venture‑capital ecosystem.
Recognition
- Included in Forbes 30 Under 30 (2011) for his work in technology.
- Recognized by Business Insider and other media outlets as an influential figure in Silicon Valley’s startup community.
Personal life
Seibel is known for his public discussions about mental health and the pressures of entrepreneurship. He maintains a presence on social media platforms where he shares insights on startup building and leadership.
References
- Y Combinator official website – leadership profiles.
- Press releases from Autodesk, Amazon, and other acquisition announcements.
- Interviews and talks archived on conference websites and video platforms.
