Competition continues to intensify in enterprise productivity – with Slack signing a deal to expand across IBM’s 350K+ employees, launch of a global ad campaign for Microsoft Teams, and reports of Google developing a new “unified communications” app for businesses.

Microsoft Teams has overtaken Slack with 20M+ daily active users, vs. Slack’s 13M users – heavily advantaged by its integration with Office 365 and the coming sunset of Skype for Business.

While Microsoft has the edge among larger customers, the reality is that enterprises will have more than one product under their roofs. Most will choose a horizontal integrated platform, and combine it with best-of-breed vendors in a few areas.

In the longer run, we can expect to see a convergence of collaboration and productivity – with collaboration taking place within existing workflows. Through this lens, Slack is beginning to look like an attractive acquisition for a major enterprise player.