No one likes to be the “No” guys. But a wave of new, consumer-like applications and cloud services crashing into the enterprise have sometimes forced IT to play that role. After all, that “cool little app” doesn’t look so cool when it opens a security hole you could drive a truck through.

Or crashes as soon as three teams try to use it at once. Any IT team could be forgiven for concluding that popularity with users and enterprise readiness are inversely correlated.

Slack is an exception. Even though people can learn Slack in minutes, it’s also a highly engineered platform that passes the most stringent enterprise test.