Threema
🇨🇭by Threema
Threema is a Swiss encrypted messenger founded in 2012 by Manuel Kasper in Pfäffikon, Switzerland. Unlike most messaging apps, Threema requires no phone number or email to register — users get a random Threema ID, enabling truly anonymous communication. All messages, calls, and files are end-to-end encrypted, and metadata is minimized by design. Threema is fully open source and has been independently audited. It's widely adopted in German-speaking countries and used by the Swiss government and military.
Why switch?
- Threema stores data on Swiss servers, enhancing privacy protection.
- Anonymous registration on Threema avoids phone number linkage.
- Threema complies fully with GDPR, ensuring strict data handling.
Consider
- Threema is not open source, limiting transparency in security.
- Migrating contacts and chat history from Signal may be complex.

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