Slack has entered the market as a business app to reduce emails and formal meetings. Slack is now known to have 5 million daily active users, and the count of paid Slack accounts has now reached 1.5 million. With more than 60,000 teams existing on Slack it has become a significant player. How is it that Slack -- a communications app – is giving more established enterprise content management companies a run for their money? And yet, there is hardly any conversation about Slack in the ECM community. Why is that?