For the record this is exactly where Slack came from as well.
From Wikipedia:
> Slack originated as an internal communication tool used within Stewart Butterfield's company, Tiny Speck, during their work on the development of Glitch, an online game. These communication tools were initially built around the Internet Relay Chat (IRC) protocol and included scripts designed to automate and organize file exchanges among their development team.
> In August 2013, Slack was launched to the public and continued to maintain compatibility with IRC, reflecting its origin. Additionally, it was also compatible with XMPP messaging protocols.