Y Combinator, the startup-building school that has launched businesses ranging from Airbnb Inc. to Stripe Inc., is expanding to four cohorts a year from two — meaning that the accelerator will be in session almost the entire year.
Spring and fall cohorts are joining the traditional winter and summer cohorts, President Garry Tan confirmed in a message. The program lasts about 11 weeks, each capped with an investor “Demo Day” when the startups pitch top venture capital firms.