Karl Fogel at
Wow. Did @SlackHQ just get niche-slapped by @Ryverapp ? http://www.ryver.com/ryver-vs-slack/ #ThereCanOnlyBeOne #CageMatch (I'm sticking with IRC...)
Is Ryver free as in free software as well? Then I might be interested :-) I'm having trouble finding that info on their site.
Not that I could find either. I would guess it is non-(free-as-in-freedom).