Software engineer Jack Dorsey is the Co-Founder of Twitter, and was the CEO until October 2008. Dorsey had the original idea for Twitter while still at Odeo, a podcasting startup which was a project of Obvious Corp. He is now the chairman of Twitter.
In May 2009, Dorsey announced his latest project code name Squirrel. Squirrel is a new mobile payment startup. It’s both an app and a piece of hardware that allows the iPhone to accept payments.
Dorsey was a student at New York University, which he dropped out of and left his job as a programmer at a taxi dispatch service in 1999 to move to San Francisco.
| Company | Date | Round | Size | Participants |
| Foursquare | 9/09 | Seed | $1.35M | 9 |