Michael Seibel ’05

Michael Seibel works at Y Combinator as a group partner and managing director of YC early stage. Seibel joined YC in 2013 as a part-time partner and in 2014 as a full-time group partner. Seibel also serves on the board of two YC companies, Reddit and Dropbox.

Seibel moved to the bay area in 2006 and was a co-founder and CEO of two Y Combinator startups: Justin.tv/Twitch (2007–2011) and Socialcam (2011–2012). In 2012, Socialcam sold to Autodesk Inc. for $60m, and in 2014, under the leadership of CEO Emmett Shear and COO Kevin Lin, Twitch sold to Amazon for $970m.

Before getting into tech, Seibel spent 2006 as the finance director for a US Senate campaign in Maryland. In 2005, Seibel graduated from Yale University with a bachelor's degree in political science. Today, Seibel spends most of his free time cooking, reading, traveling, and going for long drives. Seibel lives in San Francisco with his wife Sarah, son Jonathan, and daughter Jessica.