Slack files EU antitrust complaint against Microsoft, cites anti-competitive Teams bundling

Slack has filed a complaint with the European Commission that accuses Microsoft of unfairly bundling its Teams collaboration app with its Office 365 suite. That move, Slack argues, allows Microsoft to abuse its market dominance to “extinguish competition in breach of European Union competition law.

“Microsoft has illegally tied its Teams product into its market-dominant Office productivity suite, force installing it for millions, blocking its removal, and hiding the true cost to enterprise customers,” Slack said.

Microsoft launched Teams three years ago, making the group collaboration application available to Office 365 subscribers. Teams has 75 million daily active users, Microsoft said this week, an increase of 31 million in the past month.

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