Threema
🇨đź‡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 uses Swiss servers, ensuring strong data privacy protections.
- No phone number required for registration, enhancing user anonymity.
- All messages are end-to-end encrypted, ensuring maximum security.
Consider
- Limited group size of 256 members compared to Telegram's 200,000.
- Migration may require manual transfer of chats and contacts.

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