AT&T vs Mimecast

AT&T Inc. is an American multinational telecommunications corporation, headquartered at Whitacre Tower in downtown Dallas, Texas. AT&T Inc. began its existence as Southwestern Bell Corporation, one of seven Regional Bell Operating Companies created in 1983 in the divestiture of the American Telephone and Telegraph Company following the 1982 United States v. AT&T antitrust lawsuit. Southwestern Bell changed its name to SBC Communications Inc. in 1995. In 2005, SBC purchased former parent AT&T Corp. and took on its branding, with the merged entity naming itself AT&T Inc. and using the iconic AT&T Corp. logo and stock-trading symbol.

Mimecast is a software as a service company specialising in unified email management and Email filtering. Mimecast was founded in 2003 by Peter Bauer and Neil Murray. It is headquartered in London and maintains offices in Cape Town, Johannesburg, Melbourne, Austin, Dallas, Chicago, San Francisco and Boston. In January, 2010, the company raised $21 million in Series B financing from Index Ventures and Dawn Capital.