To pile on (somewhat). I've been enjoying using discord for the chat features. We just have one channel that I use with long-time friends to chat. Recently, we started playing games together (cross play), and Voice Chat _usually_ doesn't work well on the Xbox. I'm not sure if it's an Xbox or Discord issue though, as I'm the only PC gamer and don't have access to an Xbox to debug it :-)

mumble

The stand-alone server is small, and efficient. There are countless clients that will work with it. I've run it on Linux & FreeBSD systems.

I used to use Mumble. I still think decentralized, encrypted chat is great. But there is nothing like Discord for free.

If Mumble could do streaming/video and rich text support, I think people could be peeled off Discord a tad.

But I don't know what you're talking about regarding buggy. Discord runs pretty much perfectly for me, excepting one issue (it was either Discord or Corsair Wave) that was giving fuzzy audio with a particular virtual audio input.

For how complex the server/channel/DM/text chat/"voice channel" text chat schema is, I think it's a pretty impressive product.

https://tavrn.gg/ maybe?