The GTC team

GTC TeleCommunication GmbH was founded in 1987 and is a family company, which is characterized by highly developed technical solutions and its high standards of customer service. GTC offers its wide range of clients customized communication solutions.


This is us: a team of around 30 qualified men and women who take care of your orders, develop new products and realize your individual requirements.


We are innovative and flexible - and the most important thing for us is always you: our customer!


Do you have specific questions or requirements?
Then give us a call - on Tel .: +49 (0) 7 11- 4 90 90-82 you can reach our customer service directly.


Our management


Anja Gutacker
Managing director



  • Born in 1970
  • Graduate in business administration
  • Business Administration Studies at the Eberhard Karls University of Tübingen
  • Studied at the Université Jean-Moulin in Lyon
  • Since 1996: Head of marketing at GTC
  • Since 2009: CEO at GTC


Volker Biedinger

Managing director



  • Born in 1967
  • Graduate engineer
  • Studied at the Techincal University of Braunschweig
  • Until 1997: Assistant of the CEO at a distributor for electronic equpiment
  • Since 1997: Assistant of the CEO at GTC
  • Since 2002: CEO at GTC

Social and ecological engagement

Our role in our society is important for us. Therefore we get involved in different ways:

  • Monthly financial aid for two sponsored children and situative donations for Worldvision
  • Sustaining member of the primary school Jakobschule in the center of Stuttgart
  • Use of green electricity - savings of over 45 t CO2 every year
  • For more than 10 years education of apprentices
  • Several years sponsor of the handball team Frisch auf Göppingen (women)
  • Financial aid for several relief operations (e.g. for victims of natural disasters)
  • We regularly support Aktion Mensch, which implements many social projects

In our day-to-day work as well as in our diverse products and projects, we strive to incorporate social and ecological aspects as far as possible.





Martina Assenmacher

Ingram Micro Pan Europe GmbH

"The sending of our newsletter takes only a few minutes – nevertheless it is handled in a very professional way. We are not in need of additional software and do not have to enter a long term commitment. That’s how we stay flexible. Furthermore we really appreciate the support of the attentive GTC-employees."


Uwe Streb

Festina Uhren GmbH

"The customer service gave us great advice. Now we are getting much more out of our actions, can make campaign comparisons and achieve exactly what we want."


Jürgen Klein


"GTC is our long-standing partner for sms and e-mail boradcasting and is very reliable. Thumbs up."


Bettina Holz

X-PERION Consulting AG

"Our employees are on the road throughout Germany, partly even in Europe. A regular coordination is essential here. We are completely independent with GTC central meeting: all participants are dialing themselves in via telephone. It doesn’t matter, where the participants are. Even the dial-up from abroad happens at low costs, due to international access numbers."


Edgar Augel

Stadtmobil carsharing AG

"E-mailings created with the template editor look great. In addition, our mailings now always adapt to the size of the receivers with responsive design. Fantastic."


Roland M. Rupp

Schweizerischer KMU Verband

"The service at GTC leaves nothing to be desired. Also the simple operation, the evaluation and the multilingual menu is great."


Christof Korr

CreditPlus Bank AG

"An sms will not be overlooked. Therefore, sms-mailing is our choice when it matters. With GTC, we have found a professional, with which everything runs great. And what is especially important to us is that all data remain in Germany."

Among our satisfied customers
Datev grossKlett-Cotta großBosch großCewe colorDHL großFestinaAachen Münchener großCosAG großDeguDent großLawinen-Warndienst Bayern großSVS großWeka großIngram großIvacare Aquatec großAmnesty International großDer deutsche Wirtschaftsbrief großX-perion groß
+49 (0)7 11 - 4 90 90-0
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