Michael Seibel

Board Member at Reddit

Seibel is Partner at Y Combinator and CEO of the YC startup accelerator program, which first helped launch Reddit in 2005. He’s also the cofounder of Justin.tv/Twitch and Socialcam. During his time at YC, the accelerator has funded and advised over 1800 startups.

Born in Brooklyn, Seibel graduated from Yale with a degree in political science. In 2006, he served as the Finance Director for former NAACP president, Kweisi Mfume’s Senate campaign in Maryland. Seibel then became the co-founder and CEO of Justin.tv, the interactive video platform that would become Twitch.

Seibel lives in San Francisco, CA with his wife Sarah and son Jonathan. In his free time, he enjoys cooking, traveling, and occasionally lurking in GifRecipes.


  • Board Member

    June, 2020 - present