Food fight: Slack and Microsoft trade barbs, sling stats in collaboration app battle

Competition between Slack and Microsoft over their respective chat apps has intensified recently, as the two companies clash over new usage stats – with Slack’s share price tumbling last week in the wake of new adoption figures for Teams.

Even so, analysts say Slack’s stickiness and strong user engagement offer it an advantage as businesses begin to adopt workstream collaboration software more widely.

Microsoft last week announced that Teams now has 20 million daily active users, up more than 50% from 13 million in June. The publication of those user figures appeared to have an immediate impact on Slack’s share price, which saw an 11% drop the following day. In fact, Slack’s share price has fallen by more than half since its public listing in June – an apparent sign of investor concern over its ability to compete with Microsoft long-term. 

Launched by Microsoft in 2017, Teams is available at no extra cost with certain subscriptions of Office 365; the suite has more than 200 million monthly active users. It competes with Slack and others in a team collaboration software market worth $3.5 billion this year, according to IDC analysts.

However Slack – which announced it has 12 million daily active users in October (up from 10 million in January) – has frequently called Microsoft’s user metrics into question, claiming it does not measure daily use the same way.

Daily active use and the battle of stats

The upstart contends that its customers spend more time using its application productively each day, with individuals logged in for more than nine hours, on average. This includes 90 minutes of active interaction, the company said, such as sending direct messages or reading posts in public channels.