We're using teams in my new company, which is awful for textual communication (lacks threads in chats, groups are more like old forums than new IM). I've been experimenting with self-hosted Mattermost but it seems that it also requires paid license in some situations (e.g. does not have groups for some reason in the free version). I was unable to find another system. Would anyone recommend me something?
Threads? No pinning... no collapsible text snippets... no nothing.
No channels either.
Self hosted Matrix maybe? I remember i was on a project that was automatically mirroring the slack to a Matrix thing. Not sure how good the clients are though.