Geoff Ralston is President @ Y Combinator, the world's leading accelerator with a portfolio that includes the likes of Stripe, Airbnb, Dropbox, Coinbase, Instacart, DoorDash, Flexport and so many more. As for Geoff, he started his career running engineering at Four11, where he built RocketMail, which in 1997 became Yahoo! Mail. At Yahoo! Geoff worked in engineering, then ran a business unit, then became Chief Product Officer. After Yahoo! he was CEO of Lala, which was acquired in 2009 by Apple.