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About estos

Software with a future. Simple and uncomplicated

estos supports companies with their fast, safe and uncomplicated communication software. The estos team is proactive, forward-looking, professional and passionate. Get to know more about estos, read about our history or find out which jobs are vacant in our team. We're always looking for nice colleagues to join us in Germany, Italy or the Netherlands. 

Over one million licences in the field

Since 1997, estos has been developing communication software in Starnberg. Over the years, estos has succeeded in continually presenting products in an extremely dynamic market that are used by hundreds of thousands of users in companies every day.

One of the main reasons for our success today is the ability to recognize trends very early and take an active part in innovating emerging technologies.

The first ten years were characterized by the merging of the computer and telephony world (CTI). In the current decade, the topics of networking (federation) are relevant as well as, in the future, the increasingly use of audio/video (WebRTC).

With the takeover of the Unified Messaging System (UMS) specialist SerVonic in 2016, estos is expanding its expertise and rounding off its portfolio.

estos partners and customers appreciate the extremely easy handling of the software, as well as the professional image and the passionate commitment of the estos team. Numerous awards and a high rate of recommendations are evidence of this. 



As a technology leader, estos has its competencies in computer telephony integration (CTI), unified messaging software (UMS), SIP, XMPP, LDAP as well as WebRTC-based applications, which enable uncomplicated audio/video communication. Continuous investments in research and development create innovations and turn estos products into trend-setting originals. The company's core markets include Germany, Austria, Switzerland, Benelux and Italy. estos GmbH has its headquarters in Starnberg, near Munich, a development branch in Leonberg, an office in Berlin and branches in Udine, Italy and Amsterdam-Duivendrecht, Netherlands.



  • Dr. Alexander Seyferth
    Dr. Alexander Seyferth
    CEO and Managing Director
  • Florian Buzin
    Florian Buzin
    Managing Director

Current vacancies