VIA THE VERGE

Slack files competition complaint against Microsoft in the EU

Illustration by Alex Castro / The Verge

Slack says it has filed an anti-competitive complaint against Microsoft with the European Commission. “The complaint details Microsoft’s illegal and anti-competitive practice of abusing its market dominance to extinguish competition in breach of European Union competition law,” says Slack in a statement. Slack alleges that Microsoft has “illegally tied” its Microsoft Teams product to Office and is “force installing it for millions, blocking its removal, and hiding the true cost to enterprise customers.”

“Microsoft is reverting to past behavior,” claims David Schellhase, general counsel at Slack. “They created a weak, copycat product and tied it to their dominant Office product, force installing it and blocking its removal, a carbon copy of their illegal behavior during the ‘browser wars.’ Slack is asking the European Commission to take swift action to ensure Microsoft cannot continue to illegally leverage its power from one market to another by bundling or tying products.”

Slack has persistently claimed that Microsoft Teams is not a true competitor, largely because it’s more focused on video calls and meetings. That’s clearly not true, and Slack and Microsoft have been caught in a battle for the future of workplace communications for months now.

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