Crypto Messenger: Threema is to become open source

The Swiss crypto messenger app Threema has found an investor to expand its business. Simultaneously announced the Threema development teamthat the messenger, which is particularly popular in Switzerland and Germany, should be disclosed as open source. Until now, Threema was completely proprietary and there was a fee for use. So far this has been justified with the associated independence of the manufacturer.

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  1. Interhyp Group, Berlin, Munich
  2. German Energy Agency GmbH (dena), Berlin

After an intensive build-up phase, with the entry of the German-Swiss investment company Afinum Management AG from Zurich, Threema is laying the foundation for continuity, further growth and an acceleration of product development, according to the announcement. Afinum fully shares Threema’s values ​​regarding security and privacy. The additional resources gained through this partnership enabled Threema to grow beyond the German-speaking part of Europe. The three founders and developers – Manuel Kasper, Silvan Engeler and Martin Blatter – remained with a substantial share in the company and should continue to run the Threema company.

In the next few months, Threema will fully disclose the app source code and enable reproducible builds, the developers emphasized. “This comprehensive transparency allows everyone to independently check the security and functionality of Threema and to verify that the published source code matches the installed app.” Threema is taking up a criticism that the data protection activists in
the past repeated over and over again. Threema’s claims to protect privacy can only be checked if the app’s code is open source, it said.

The Threema makers also announced a new function: In the future, it should be possible to use several devices in parallel. In contrast to other approaches, no trace of personal data should be left on a server. Thanks to this technology, Threema can be used on a PC without a smartphone.

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