But how about Matrix, Rocket.Chat, Mattermost, IRC, and other open source chat servers?

Mattermost is a terrible example of open source. It is just cheap rip-off of Slack and every pixel say that.

That’s the only one I mentioned that I haven’t used. I just figured it’s open source, so it’s more suitable than Slack or Hipchat. Thanks for the feedback, won’t be going out of my way to try Mattermost.

I have not used them so I cannot comment on that.

+1 for Matrix. Awesome technology.

> It seems better than other trash messaging platforms.

I mean you're not wrong, but you're not setting the bar particularly high :).

I think we need to be explicit, Slack isn't always conducive to the needs of open communities. Some of its features are extremely friendly to users, like having the possibility of full message history retention and mobile apps. But the former does require you be paid, and the latter is also possible with other solutions.

And immensely better than Microsoft teams

Notably, pasting code into skype seems to be an emoji-filled land of adventure.

Although everything is better than Google Chat.

That's debatable. I can't stand hipchat but at least it doesn't fall over loading gifs.

Is it really debatable when Atlassian gave up on hitchat.