The best websites like Threema.ch. Top Threema.ch alternatives 2020. Explore 16 alternatives to Threema.ch and read 10 reviews now on SameAs.NetEEEMA, which stands for “End-to-End Encrypted Messaging Application”, provides a secure service to its users by changing its name to Threema. This application is available in 11 languages and has the same features as all communication applications such as sending and receiving text messages, making voice calls, sharing photos, video animated GIFs, and sending files. On the other hand, the features that make Threema special are the many differences such as creating surveys, backing up important data, contact verification with QR code, changing message text formats, and creating distribution lists. Let's not forget: you don't need your phone number for this app.