Advanced end-to-end encrypted chat
Talk and chat with total peace of mind: your communication is protected with end-to-end encryption and the most secure open-source technology.
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Threema
Available for Android: download the APK and sign in using your activation code.
- Group chats
- Encrypted calls
- Secure messaging
Main features
Contact verification
Verify your contacts by scanning their QR code to protect yourself from man-in-the-middle attacks.
Group chat
Send messages to multiple recipients simultaneously. Management is decentralized, and only members know each other’s identity.
Voice and video calls
Make calls without revealing your number. Calls in Threema are end-to-end encrypted and offer exceptional sound and video quality.
Private messaging. Simple and secure.
Zero-knowledge principle
The zero-knowledge architecture ensures only recipients can access the content. Neither third parties nor Threema can read your messages, ensuring total privacy.
Anonymity
Threema protects your privacy: you don’t need a phone number or email. With your ID, you can communicate securely without exposing your identity or personal network.
Maximum protection
Messages are deleted from our servers after delivery, and contact lists stay on your device, leaving minimal digital traces and protecting your identity.
Ad-free
Threema runs without ad networks or Big Tech. It doesn’t sell data or use advertising, ensuring reliable and private communication at all times.
Award-winning app
Google and Apple recognized Threema by including it in their prestigious list of the best security apps in their stores.
Top ratings
Users prefer Threema. It’s the app with the most users and the widest reach.
