More than 15,000 founders from 7,200 startups applied to this batch of Y Combinator. It chose just over 100, with founders from 22 countries, to go through its accelerator program. Today, the second half of those companies launched onstage, and we have breakdowns of all 51 of these businesses. Oh, and the ACLU. The 97-year old legal activism nonprofit is far from a startup, but went through YC to
