Signal’s mission and sole focus is private communication. For years, Signal has kept your messages private, your profile information (like your name and profile photo) private, your contacts private, and your groups private – among much else. Now we’re taking that one step further, by making your...
SimpleX was the best for my purposes when I looked, but Briar is a compelling option as well.
The case can also be made for element, but it lacks forward secrecy and honestly the app kinda sucks.