What do you think is the best Slack alternative from the Open-Source area in the focus of engineering offices?

If not listed please mention as a comment.

#boost #poll #slack #floss #foss #chat #business #opensource #alternative


@kubikpixel I only used Mattermost and Matrix. I think Mattermost suites very well for big organizations because users can be part of multiple separate teams with their own channels. But all this web-based solutions are slow and hungry on resources (compared to XMPP) and do not work well on phones.

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