In Slack’s case, there were existing solutions that companies had paid money for like hipchat or IRC. So existing competition is one way. If you find that a co

In Slack’s case, there were existing solutions that companies had paid money for like hipchat or IRC. So existing competition is one way. If you find that a company is spending skilled time (translation:money) on a crappy internally-cobbled together verson of your product, even better.