How we think
Who we are
OpenTalk
OpenTalk has been developed by the Berlin-based company Heinlein Support, with 30 years of experience in the design and operation of secure electronic communication. Know-how and passion for open source unite our team. Transparency and integrity are our shared values. Data protection and digital sovereignty are the essence of our DNA.
What does that mean for you? We are partners on an equal footing and will make your goals our own. What began as a project for the city of Berlin with the development of a city-wide video conferencing platform has now led to the development of OpenTalk, a solution that provides what businesses, political organizations, authorities and schools need.
Our Background
Heinlein Support GmbH
The mother ship with more than 60 employees. We are Linux and open source experts and operate our own data centers. We also provide 24/7 support for other administrators. We design customized solutions, offer honest advice, and practical hands-on help.
mailbox.org
E-mail, cloud solutions and hosting that uses the latest security standards, powered by green energy. This is how secure and free communication works for businesses, private individuals, and also many teachers and educational institutions. mailbox.org was founded in 2014 and has won multiple awards since.
„With OpenTalk we have thought video conferencing new and to the end. Sophisticated features, a modern IT architecture and open source. That's what drives us.“
Gründer und CEO
News
OpenTalk at the Siedl Community Summit 2025
On June 11, 2025, the first Siedl Community Summit (SiCom) in Krems an der Donau will bring together IT professionals, open source enthusiasts, and decision-makers from the industry.
Open source as a growth engine for Berlin's digital future
The results of a representative survey conducted by the Berlin Chamber of Commerce and Industry (IHK Berlin) are clear: open source software (OSS) is no longer a niche topic, but a decisive economic factor for Berlin as a digital location.
OpenTalk Update: Improved security & user-friendliness
Digital communication is constantly evolving—and so is OpenTalk. The update of our video conferencing solution to version 25.1.3 brings significant improvements.
OpenTalk, Open Source and Open Minds.
We are currently looking for new colleagues who would like to work full time, e.g. as a Rust Developer, Frontend Developer or QA Manager.
