The messenger that puts security and privacy first.
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Threema meets the requirements of Switzerland’s strict data-protection laws and is fully compliant with the new EU General Data Protection Regulation (GDPR). Learn more…

Guaranteed Privacy
Threema is designed to generate as little data on servers as possible: Groups and contact lists are solely managed on users’ devices, messages are immediately deleted after delivery. This effectively prevents the collection of meta data.
Best-in-class Encryption
Threema end-to-end encrypts all your communication including messages, voice calls, group chats, files and even status messages. Only the intended recipient, and nobody else can read your messages.
Versatile and Feature-rich
Threema makes secure communications easy and fun. Send text and voice messages as well as files and locations in single and group chats. Make voice calls, create polls, and use Threema on the desktop with Threema Web. All features.
Full Anonymity
Each Threema user generates a random Threema ID. No phone number or email address is required in order to use Threema. This enables you to use Threema completely anonymously.
Trusted Contacts
Verify your contacts by scanning their QR code or by comparing the key fingerprints. This effectively prevents man-in-the-middle attacks, and you can be sure to communicate directly with the intended person.
Independent Company
Threema is a 100% independent and self-financed company in the heart of Switzerland with its own servers and in-house software development.
Threema Web
Chat from your desktop with Threema Web and have full access to all chats, contacts and media files.

End-to-end encrypted voice calls: Tap-proof, anonymous, and in brilliant voice quality

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