In the fast-expanding enterprise application market, Slack grew faster than all of its peers this year, according to data released Monday.
The workplace messaging app grew more than 600 percent in 2015 within Okta, a single logon service for thousands of apps. Okta said it beat out other top platforms, including Microsoft's Azure cloud service.
"We are calling them the Usain Bolt of cloud apps. We think it's a trend. End users are loving the app and bringing their IT departments on board with them," said Cathy Tanimura, director of analytics and big data at Okta.