Mattermost: Open-source, on-premises, Slack alternative
I don't really get why there is so many Slack alternatives coming up these days.On every post like this there is tons of comment linking to other Slack alternatives, it's not like this is gonna be _the_ Slack-alternative.Here is a non exhaustive list :RocketChat : https://news.ycombinator.com/item?id=9624737Let's Chat : https://news.ycombinator.com/item?id=9040841Friends : https://news.ycombinator.com/item?id=9461504Gitter : https://news.ycombinator.com/item?id=6739074