> Easy-ish to self-host, cheap to buy hosted. And, perhaps most relevant to my complaint, they offer hosting for open source projects (unlike Mattermost which

> Easy-ish to self-host, cheap to buy hosted. And, perhaps most relevant to my complaint, they offer hosting for open source projects (unlike Mattermost which is ... like, "send us email and we'll think about it" or something). I would guess Mattermost would feel the most comfortabe to Slack users, since I admit that Zulip has a different mental model than Slack, but I believe it is much better for ongoing thread management once one gets used to it (IOW, had they won the fight, it would be Slack that would be the "eww, what is going on with this threading model?!") --- https://github.com/zulip/zulip#readme https://github.com/zulip/zulip#readme (Apache 2!) just as a contrast to the sibling's LMGTFY comment :-(