Jack Dorsey showing off Twitter back in 2006

Jack Dorsey showing off Twitter back in 2006Show more

Jack Know Dorsey (born November 19, 1976) is an American Internet entrepreneur, philanthropist, and programmer, who is a co-founder and former permanent CEO of Twitter, Inc. from 2015 until 2021, as well as co-founder, principal executive officer and chairperson[4] of Block, Inc., which is the developer of the Square financial services platform. As of October 2023, Forbes estimated his net worth to be $3.1 billion.

The first Twitter prototype, developed by Dorsey and contractor Florian Weber, was used as an internal service for Odeo employees. The full version was introduced publicly on July 15, 2006. In October 2006, Biz Stone, Evan Williams, Dorsey, and other members of Odeo formed Obvious Corporation and acquired Odeo, together with its assets—including Odeo.com and Twitter.com—from the investors and shareholders.Williams fired Glass, who was silent about his part in Twitter's startup until 2011. Twitter spun off into its own company in April 2007.Williams provided insight into the ambiguity that defined this early period in a 2013 interview