TeamSpeak and Ventrillo still work great. It was a monumental mistake to switch to these 3rd party services that are bugged by every intelligence apparatus on earth.

That would be great if your community only exists in a voip channel

I had a look at Teamspeak but you need to email somebody for permission to have more than 32 users on your server.

I gave up running my TS3 servers (after nearly a decade) because they added a trialware system that required getting approval/serial code from the company every month to continue operating. They were squeezing everyone on TS3 trying to force them to TS4/5/etc. Have they stopped this or walked it back?

And to be clear, Teamspeak from version 5 on is not teamspeak. It's matrix with a skin. Not that that's terrible, but it's not great for running it on low power/cost VPS like actual teamspeak was.

Could use mumble instead?

Those are voice chat, yeah? Discord has chat too, which is used more than voice in many of my communities.