The buw Holding GmbH was an owner-run German company based in Osnabrück acquired by Convergys through a definitive merger.

It is especially known for its call centres and has altogether about 6,000 employees who work in Osnabrück, Münster, Halle, Schwerin, Berlin, Leipzig, and Wismar[2] in Germany, Pécs in Hungary,[3][4] and Timișoara and Cluj in Romania.

[5] Jens Bormann and Karsten Wulf, who met at the University of Osnabrück, founded their company in March 1993[6] as b u. w (Bormann und Wulf) Telefonmarketing GmbH while they still were students.

In 2002, employees founded the organisation Lernen fürs Leben ("Learning for Life") which is committed to projects in the Third World, in particular if they serve the purpose to teach people how to make a living on their own.

[7] In 2006, the company received the European Call Centre Award for its corporate identity.