Its looking like Microsoft is gonna buy Discord. Preferably open source, and has a big userbase, and has Windows and Linux option. (but mainly windows because i only game on windows now.)
Matrix
Not really a Discord alternative until they ship voice channels. Revolt chat is a straight up Discord clone, but it’s not federated, they have really obfuscated the way to self host it, and their releases are way older than what the main server is running. Plus, it’s developed by kids who don’t give a crap about anything.
So, Matrix is the best chat out there, but it’s not a Discord alternative.
Revolt
Spacebar-chat
Teamspeak
Teamspeak still under development? Damn! Haven’t seen anyone mention teamspeak in a while! That was the standard back in the OG CS days.
Teamspeak 5 looks very cool but you can’t selfhost it yet…