Michael Seibel is a Partner Emeritus at Y Combinator, having first joined the organization in 2013. He served as CEO of the Y Combinator Startup Accelerator from 2016 until March 2024, advising hundreds of startups and actively promoting diversity efforts among founders. He returned to his original role as partner in March 2024.
Prior to his tenure at Y Combinator, Seibel co-founded two notable startups. He was CEO of Justin.