Drillisch AG is a holding company, which is engaged in the provision of mobile communication and software services. Its brands include AIphatel, Victorvox, Telco, Simply Communication, McSim, and IQ-optimize. The company operates through Telecommunications and Software Services business areas. The Telecommunications business area provides services to the T-Mobile, Vodafone, E-Plus, and O2 networks. It also markets prepaid products and offers virtual cash card system. The Software Services business area includes the billing system and software for mobile communications and mobile internet content, as well as the document management software for internal process optimization. The company was founded by Hans Jochen Drillisch, Marc Brucherseifer, and Nico Forster in 1983 and is headquartered in Maintal, Germany.