Matrix community requires one to sign up with a supporting app create and verify identity which is sadly tied to a server
I f I understand it correctly ithese are not very portable
and if the server is no longer working what happens?
Will sow IndyWeb communities will compare with this
To join Any Indy/web Community there is no signing in or sogning up
When you enage with web accesible content shared by an named individual who is a player in the IndyWeb
or a named community there the engagement itself creates secure private direct connections which in turn allows 1 to comment, annotate content and engage in conversations
Once a rapport and trust is established people who gain trust can be oining the netowkr of the individual or the community
If they ever wis to create heir owned network they would need to iether run their own Peergos server or signup witth Peergos to create their peergos names as an anchor to their nowned networks