Threema!

Threema is the worlds favorite secure messenger and keeps your data out of the hands of hackers, corporations and governments. Threema can be used completely anonymously, allows to make end-to-end encrypted voice calls, and offers every feature one would expect from a state-of-the-art instant messenger. SUPPORT / CONTACTFor questions or problems please consult our FAQs: https://threema.ch/en/faq