Small list I have put together for alternatives to #discord
I am looking at this from a non-technical perspective...

Willing to hear about other platforms though/

#Matrix = YES = BUT Onboarding is difficult.
#Root = MAYBE = US-Based... Has funding from Crunchyroll founder

#Stoat / #Revolt = YES = Has potential, needs time to develop.
#Spacebar = NO = Not actively developed. (Last commit 10 months ago)
#TeamSpeak 3/6 = NO = Requires joining voice channel in order to text chat.

@padraig Spacebar is consistently developed! You might've been looking at the last landing page update?
Though it's worth noting it's a Discord reverse-engineering project, rather than aiming for being the new alternative chat platform
™️. That said, federation is planned, but is not priority.
@emergencygg There was no commit since April, until the 11th (the day after I posted this) to say "Bump commit date so we don't seem dead". I did check the other repos and other than 'chore' updates, I didn't see anything else being committed. Happy to be proven wrong.
@padraig Yeah, the one with the bump is the landing page! The development is in the server repo (screenshot attached). We might have different ideas of what count as chores, but I can say voice chat, which is currently disabled on the official instance while being debugged, has only even worked since November last year, which is a pretty big addition.