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Photo Illustration: Omar Marques/SOPA Images/LightRocket via Getty Images

Slack filed an antitrust complaint against Microsoft in the European Union Wednesday, arguing it's anti-competitive that Microsoft ties its Teams workplace collaboration software to its Microsoft Office suite of products.

The big picture: Slack's suit adds to the growing list of big U.S. tech companies under global scrutiny for potential antitrust violations.

Details: Slack alleges Microsoft has illegally tied Teams to Office products, forcing installation and blocking removal.

  • “Microsoft is reverting to past behavior," Slack general counsel David Schellhase said in a statement. "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.’"
  • Like Slack, Teams is aimed at enterprise customers and enables users to chat, video-conference and share files with one another.
  • Slack wants the European Commission to stop Microsoft from bundling or otherwise linking the products, he said.

The other side: "With COVID-19, the market has embraced Teams in record numbers while Slack suffered from its absence of video-conferencing. We’re committed to offering customers not only the best of new innovation, but a wide variety of choice in how they purchase and use the product," a Microsoft spokesperson said.

  • Slack does support video chat, but only within a subscribing organization, and only on desktop.
  • "We look forward to providing additional information to the European Commission and answering any questions they may have," the Microsoft spokesperson added.

Editor's note: This story has been updated to include a statement from Microsoft.

Go deeper

U.S. vs. Google — the siege begins

Illustration: Sarah Grillo/Axios

The Justice Department fired the starter pistol on what's likely to be a years-long legal siege of Big Tech by the U.S. government when it filed a major antitrust suit Tuesday against Google.

The big picture: Once a generation, it seems, federal regulators decide to take on a dominant tech company. Two decades ago, Microsoft was the target; two decades before that, IBM.

China's crypto throwdown

Illustration: Sarah Grillo/Axios

China's latest move to ban cryptocurrency shows how tough it will be for the technology to deliver on its backers' vision of disruptive, decentralized change.

The big picture: Control of the currency is a foundation of sovereignty, and governments don't plan on losing that control even as money inevitably turns digital.

D.C. homicides fueled by rundown properties

Illustration: Sarah Grillo/Axios

Angela Washington was the last line of defense for residents at the Oak Hill Apartments in Southeast besieged by gun violence. Then, on the evening of Sept. 21, the 41-year-old special police officer was shot to death.

Why it matters: The District’s spike in gun violence is being linked partly to rundown properties that city officials and residents say have become magnets for criminal activity.

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