

I do a presentation of the Fediverse to my college students and will soon be giving short workshops to organization as well. I realize that a viable, decentralized altenative to Facebook is IMO the biggest missing piece of the puzzle. We need something that offers some kind of central platform for networking, events, groups
Well if you want decentralised solutions, there’s Mattermost and there’s just a plain old Matrix server. Both are better-suited to collaboration projects than Facebook ever was. I’d argue the only reason it ever morphed into that role in the first place was because everyone was on there, it had little to do with features.

Been running a server for my friends for over a decade now. Can recommend. It’s just one apt-get to set up, runs on a Pi Zero for a dozen people, has clients available for pretty much any platform and doesn’t really require any maintenance. Latency will depend on the routing between you and your friends’ ISPs, of course, but the whole purpose of the software itself was to provide a low-latency voicechat server for gaming.
But: That’s it. You don’t get anything else. It’s a barebones voice chat server. You can set up rooms and have basic text-functionality, but you don’t get any fancy user management, no full-fledged chatrooms, no persistence beyond the room setup and only limited backend options. Keep that in mind.