Actually, “Mewe” might be a realistic replacement. I took a look at it, but didn’t actually create an account. I wanted to know how it was that they intended to make money (which any business needs to stay alive).
I liked how they offered some features free, and some features are paid. For example, reliable voice and video calls are paid (but secure/private).
At first I thought, “what? Pay for voice and video? But you can get free, private voice and video calls from Wire and Signal”.
But then I eventually realized that you might get private, free calls from Wire and Signal, but don’t ask them to be reliable, as it’s a free service. It seems to be one of those famous engineering dilemmas that goes something like “free, private, and reliable. Pick any two.” There’s also a famous (albeit less helpful) phrase now that goes “if you are not paying for the product/service, then you are the product/service”.
In other words, if you want private, and reliable voice and video calls, then I say, expect to pay a little something for that. Voice and video demand much more bandwidth than plain old text messages, implying the need for fancy-schmancy technologies (like STUN, TURN, ICE, and Jingle, and a distributed network of servers relaying the connections around).
Somebody deserves to be paid somehow or other to create and maintain that infrastructure. At present, this infrastructure is paid for by allowing one’s privacy to be raped and pillaged (on services like WhatsApp and Facebook Messenger).
So I think people need to be willing to open their wallets, even just a crack, if they desire freedom from the Stalkers and AI robots.
PS: By having free accounts on both Wire and Signal, I’ve found that if one is behaving unreliably, the other one works! They seem to have infrastructures that get too busy, from time to time (for the free accounts), but thankfully both have not been too busy at the same time, at least not so far. Having said that, Wire seems to be the more reliable of the two (but is not completely perfect; it has a couple of minor bugs I’ve learned to live with).