Threema. A secure communication tool.

Threema is the world´s best-selling secure communication tool, ensuring your data stays out of the hands of hackers, corporations, and governments. This service can be used completely anonymously. Threema is open source and offers all the features a state-of-the-art instant messaging tool should provide. The application also supports end-to-end encrypted voice, video, and group calls. You can also use Threema on your computer via the desktop application and web client.

Privacy and Anonymity
Threema is designed to generate as little data as possible on its servers. Group member and contact lists can only be managed on your device and are never stored on our servers. Messages are deleted immediately after being sent. Local files are encrypted and stored on your phone or tablet. All these measures effectively prevent the collection and misuse of your personal information, including large amounts of data. Threema fully complies with the latest European Privacy Act (GDPR).

Absolutely Reliable Encryption
Threema uses end-to-end encryption for all your communications, including messages, voice and video calls, group chats, files, and even status messages. No one other than the designated recipient can read your messages. Threema uses the trusted open-source NaCl encryption library for encryption. Encryption keys are generated and securely stored on the user´s device to prevent backdoor access or copying.

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