Foerster&Thelen Marktforschung Feldservice GmbH is one of the oldest independent data collection agencies in Germany. In 2007 Foerster&Thelen registered the trademark F+T Group to serve as the umbrella brand and combined presentation/communication platform for all of the companies that Foerster&Thelen and the single associates mutually hold shares in .

The F+T Group consists of the following five companies:

Foerster & Thelen
F+T Testudio
Dr. haspel
Webfrager
Rosenthal
Under the designation IFS (International Field Solutions) the F+T Group cooperates with partners in North America in order to serve the local market.
International field solutions
CATI Research, Focus Groups, Online Research, In Depth Interviews, Online Focus Groups, F2F Research, Central Location Tests, Mystery Shopping, International Project Coordination.