Also called "team chat" and currently most exemplified by Discord and Slack, sometimes Matrix and IRC.

== Levels

There are different kinds of community chat space.

* 4 friends talk, mostly one thread, often silent. Group text
* Totally private family or friends or company. At some size multiple common topics or uses can emerge, threads are more common
* Invite only / approval only fully private. A club. Existence is public, logs may or may not be, but you gotta be approved to get in.
* Public community

== Features

* Long archive retention
* Full text archive search or better
* Ask for voice and/or apply for membership in a channel or server
* Related topic spaces (multiple channel or durable threads or something)