Paul Buchheit co-founded social network aggregator FriendFeed, along with three other former Google employees. He is also an investor in FriendFeed and participated in a $5 million Series A round in February 2008. He was the 23rd employee at Google, where he created Gmail and implemented many of its innovative features. He developed the original prototype of Google AdSense, and was responsible for Google's famous "Don't be evil" motto in a meeting.