Threema

Threema is the world’s best-selling secure messenger, keeping your information out of the hands of hackers and corporations. The service is completely anonymous. Threema is open source, allows you to make end-to-end encrypted voice and video calls, and has all the features you would expect from a modern instant messenger. With Threema Web, you can also use Threema from your desktop.

Details

Threema is an accessible, easy-to-use and highly secure instant messaging application made in Switzerland. You can send secure messages, video and voice calls using a Threema ID that you create completely anonymously. The app is paid as it does not sell advertising and has no partnership to cover server costs. For a one-time fee of $5, you get a licence for the app and can text using the same Threema ID on your phone and computer. It has all the features you would expect from a messaging app and more, including voice and video calling, voice messaging, location and file sharing.