I’ve tried most of these. A lot seem more geared towards slack alternatives or more like work chat type things. Voice chat is critical and some lack it or have it tacked on. Teamspeak is the opposite which text chat is tacked on. The closest alts right now are stoat, fluxer and root. Fluxer and stoat and open source, root is VC funded. I’m pushing for fluxer personally. But he is getting hug of death at the moment.