The messenger that puts security and privacy first.
Pay once, chat forever without ads.


No Ads, No Investors, No Conflicts of Interest
Threema is ad-free, and it will always stay that way. The company is fully funded by its app sales and by corporate customers’ subscriptions. Thanks to the solid business model, Threema is not dependent on any investors. We are only committed to our users.
Chat Anonymously: No Phone Number Required
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.
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. Learn more…
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 Features, No Gimmicks
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. Feature overview…
100% Swiss Made
Threema is a completely independent and fully self-financed Swiss company based in the Zürich metropolitan area. We are dedicated to privacy protection since day one. Everything is done in-house, from software development to support, and we maintain our own servers. Learn more about us…
Threema Web

Threema Web

Chat from your desktop, and have full access to all chats, contacts, and media files.

Voice calls

End-to-end encrypted, tap-proof, anonymous, and in brilliant voice quality.

Threema Calls