Instead of trying to figure out which messenger provides the best “security” features by certain technical standards, think about precisely the kind of security you need. https://www.eff.org/deeplinks/2018/03/thinking-about-what-you-need-secure-messenger
Thinking About What You Need In A Secure Messenger
All the features that determine the security of a messaging app can be confusing and hard to keep track of. Beyond the technical jargon, the most important question is: What do you need out of a messenger? Why are you looking for more security in your communications in the first place?The goal of...