Re:Open Sourcers Race to Build Better Versions of Slack
by goffi on Thursday March 17, 2016 @12:30PM
(#11305439)
You may want to check http://salut-a-toi.org/ then (I'm working on it), we have a similar architecture and it's a very active project, XMPP only though.
http://telepathy.freedesktop.org/