Twitter was co-founded in 2006 by Jack Dorsey, Biz Stone, Evan Williams, and Noah Glass. The idea originated at Odeo, a podcasting company where Jack Dorsey proposed a short message service (SMS)-based platform for sharing brief updates, which became Twitter

. Jack Dorsey is often credited with the initial concept and sent the first tweet on March 21, 2006. He served as Twitter's first CEO from 2006 to 2008 and again from 2015 to 2021

. Evan Williams and Biz Stone were instrumental in developing and scaling the platform, while Noah Glass contributed significantly to the early development and is credited with coining the name "Twitter"

. In summary, the founders of Twitter are Jack Dorsey, Biz Stone, Evan Williams, and Noah Glass, with Jack Dorsey being the key figure who came up with the original idea and launched the platform