With Threema Instant Messenger Going Open Source It Will Be One Of the Most Secure Messengers Even Over Signal
Threema does seem to tick all the boxes including not requiring any e-mail address, phone number or SIM to register, and authenticating contacts via QR code, biometric or PIN login access.Yes it does not have group video calls (just 1 to 1) but security and privacy come first before nice-to-haves. It has Android and iOS...
