I've been using Signal for a couple of months. Even though it works it has some quirks (slow to load up on macos, sometimes message lifetimes don't seem to be working, messages taking time to arrive to a second device although both have the application running). WhatsApp was better in that regard, but I'd prefer to use something a little more independent :)

Ah, and will try Keybase soon, although the downside of these switches are that I need to convince people around me to use them too..