Threema. The Secure Messenger

Threema protects what really matters: your privacy. Our FAQ can help: Enjoy using Threema! Threema protects what. Threema is the world's best-selling secure messenger, used by more than 12 million people in over 175 countries, developed in Switzerland, and designed with privacy and data protection in mind. Whether chats, calls, or files, everything is end-to-end encrypted, and no data trail is left behind. Instead of a phone number or email address, a randomly generated Threema ID serves as a unique identifier - anonymous and secure.

Advantages of Threema: Text and voice messages, including emoji reactions End-to-end encrypted voice, video, and group calls Location sharing Sending files in all formats (PDF, GIF, MP3, ZIP, and more) Ability to edit sent messages and delete them for chat partners Desktop app and web client for convenient chatting on your PC Group creation and polls Light or dark mode No ads, no trackers, no data collection Identity verification of contacts by scanning their QR code Reliable security: Open source and regular audits Servers in Switzerland Anonymous use possible: no phone number or email address required Messages are deleted from the server immediately after delivery Do you have any questions or problems?

Really matters: your privacy. Advantages of Threema: Text and voice messages, including emoji reactions End-to-end encrypted voice, video, and group calls Location sharing Sending files in all formats (PDF, GIF, MP3, ZIP, and more) Ability to edit sent messages and delete them for chat partners Desktop app and web client for convenient chatting on your PC Group creation and polls Light or dark mode No ads, no trackers, no data collection Identity verification of contacts by scanning their QR code Reliable security: Open source and regular audits Servers in Switzerland Anonymous use possible: no phone numbe. The interface is organized for quick access to the most frequently used functions, reducing the time needed to complete common tasks.

Advanced options are available for users who want to customize their experience and optimize the application for their workflow. Data sync and backup features help users keep their information safe and accessible across multiple devices when needed. The application supports a wide range of file formats and integrates with popular services to extend its usefulness. Performance optimization ensures smooth operation even on older hardware, making it accessible to a broad user base. Comprehensive documentation and in-app guidance help new users get started quickly while power users can explore advanced capabilities. Users can organize content, apply filters, and access key functions through an intuitive layout that minimizes learning curve.

Cross-platform support and cloud integration extend the application's reach across different devices and ecosystems. Built-in tutorials and contextual help ensure that users can discover and master features at their own pace. Advanced options are available for users who want to customize their experience and optimize the application for their workflow. The interface is organized for quick access to the most frequently used functions, reducing the time needed to complete common tasks.