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.

Threema end-to-end encrypts all your communication including messages, group chats, files and even status messages. Only the intended recipient, and nobody else can read your messages.

Threema makes secure communications easy and fun. You can send photos, videos, voice messages, and any type of file (PDF, GIF, MP3, DOC, ZIP, etc.). Use Threema on the Desktop, create groups or poll your friends. And there is much more to discover.

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.

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.

Threema is a 100% independent and self-financed company in the heart of Switzerland with its own servers and in-house software development. Switzerland is a country with some of the most user friendly privacy laws in the world.