Paul T Buchheit is a US computer programmer and entrepreneur. He is the creator and lead developer of Gmail. He developed the original prototype of Google AdSense as part of his work on Gmail. He also suggested the company's now-famous motto "Don't be evil" in a 2000 meeting on company values.
Buchheit was a founder of the startupFriendFeed, which was launched in 2007 and was acquired by Facebook in 2009, in a private transaction.
In 2010, Buchheit left Facebook to become a partner at the investment firm Y Combinator. From 2006 (when he started investing) until 2008, Paul invested about $1.21 million in 32 different companies. He also continues to oversee angel investments of his own, in (by his own estimate) "about 40" startups.