>>327950007
matrix works pretty well these days. It's missing a few nice features from discord still, but I find it quite usable for a small group. The main downside is the homeserver is bloated and uses a ton of ram; you'll need a beefier VPS than lowendbox specials. If you don't care about the federated logins, rocket.chat and mattermost are also self-hostable chat programs that have more polish in some areas.