The GTC team is taking care of everything!

GTC TeleCommunication GmbH is a family business in private property.

Due to highly developed solutions and high requirements to its customer advisors, GTC is able to offer it’s wide client base custom-made communication solutions.

Our team for you

That´s who we are: a team of about 30 qualified women and men taking care of your orders, developing new prodcts and taking care of your individual requirements.


We are innovative and flexible. And the most important for us is you - our customer!


Do you have special questions or requirements? Just call us:

at  Tel.: +49 (0)7 11- 4 90 90-82 you will reach our customer service directly.


Our management


Anja Gutacker
Managing director



  • Born in 1970
  • Diplom-Kauffrau
  • Graduated in business administration at the Eberhard Karls Universität 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
  • Diplom-Ingenieur
  • Studied at the Technischen Universität 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
  • Utilisation of green electricity 
  • For more than 10 years education of apprentices
  • Financial aid for several relief operations (e.g. for victims of natural disasters)

We always try to incorporate social and ecological aspects in all our projects and products.



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
+49 (0)7 11 - 4 90 90-0