2 ms·Try Mattermost.by microdrum 8y agoTry Mattermost.Operyl 8y agoLast time I seriously gave it a try (4-6 months ago or so, it was during the last major slack outage for 4-6 hours or whatever it was) it was .. not pleasant to use really. Next on my list is zulip.microdrum 8y agoIt's super performant for me these days.