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Re:Why Slack is inappropriate for open source communications by false-mirror on Tuesday April 11, 2017 @01:39PM (#14090472)
Or better yet, Rambox ;)

http://rambox.pro/

Re:Why Slack is inappropriate for open source communications by giancarlostoro on Tuesday April 11, 2017 @08:32PM (#14093804)
Definitely checking that one out, thank you.