Why are Hipchat or Bitbucket shunned? Hipchat is a slimmer version of Slack but pretty much does the same things. Bitbucket is just a github with a Atlassian skin.
Hipchat's on premise version doesn't work in an air gapped network with certain needed features (video chat is one). You do not want to know how much they ask per year for the on premise version (for greater than 10 users).
