Twitter - early microblogging platform founded in San Francisco

Twitter was created in San Francisco in 2006 as a project inside Odeo and spun out as an independent company co-founded by Jack Dorsey, Biz Stone, and Evan Williams. Twitter popularized the microblogging format and real-time short-message social networking, shaping public instant communication online. The company maintained a prominent San Francisco headquarters at 1355 Market St.