Garry Tan is the President and CEO of Y Combinator, a prominent startup accelerator that funds hundreds of companies annually. Under his leadership, Y Combinator has funded over 90 companies valued at a billion dollars or more, contributing to more than $800 billion in market value. He first served as a partner at Y Combinator from 2011 to 2015, where he developed key software like Bookface and Demo Day realtime video.