twenty4help Knowledge Service AG provides technical support, customer care services, and professional consulting services to technical and IT support outsourcing companies in Europe. The company offers services, such as technical help that include IT help desk functions; business support, which include providing data systems; and customer care services for users of digital systems and consumer electrical goods. It also offers SalesPlus, a service that delivers strategic consulting to sales departments. The company operates in Germany, the Netherlands, the United Kingdom, Sweden, Spain, Poland, and Czech Republic. The company was founded as 1&1 ServiceLine Gmbh in 1992 and was renamed as twenty4help Knowledge Service AG in 2000. The company is based in Dortmund, Germany. As of March 12, 2007, twenty4help Knowledge Service AG is a subsidiary of Teleperformance.