I have nothing against Signal. I just don’t have access to a phone number right now. I fully intend to use the Signal when I get a number. I know there is no silver bullet, no absolutes in the privacy world but I’m looking for any messengers that are generally considered to be private and secure on Android that I can try to convince my friends and family to use. I have a mid - low threat model, it’s just the thought of giving the Zuck anymore of my family’s data makes my skin crawl.
I have used Matrix; XMPP; Session and Jami. I like all of them but use Matrix the most as my wife prefers it and I message her the most. I have heard good things about Delta Chat but haven’t gotten around to trying it yet.