Threema Web is currently only available for the Android version of Threema. Threema for iOS and Threema for Windows Phone are not yet supported.

Since Threema Web is web-based, it is platform-independent. Please use the latest version of Chromium, Google Chrome, Mozilla Firefox, or Opera.

Since Threema Web is based on WebRTC data channels, Safari and Microsoft Edge are currently not supported.

You can also host Threema Web on your own server.