I thought lack of control in the free offering of mattermost is one of the things people complain about the most. It seems riot/matrix and rocket.chat seem qui

I thought lack of control in the free offering of mattermost is one of the things people complain about the most. It seems riot/matrix and rocket.chat seem quite popular. I liked the e2e in riot but it seemed a bit cumbersome. Rocket.chat was quite popular at CCC so I guess it's probably decent as well.