Microsoft Sued by Slack Over Teams Bundling in UK

By EC Assets · Published 28 April 2026 · Updated 28 May 2026

Microso is facing a new antitrust lawsuit in the UK related to the bundling of its Teams communication platform. The complaint alleges that Microso illegally tied Teams to its Office applications. This action follows previous antitrust scrutiny Microso has encountered regarding its business practices. The lawsuit has been filed by the messaging app Slack. Slack's owner, Salesforce, ly behind this legal challenge in the UK. This development indicates continued pressure on Microso concerning its market dominance in productivity soware. The filing of this lawsuit in the UK marks a new front in the legal battles over soware bundling. Microso has previously faced similar allegations in the European Union. In the EU, Microso unbundled Teams from its Office suite to avoid a substantial fine. The outcome of this UK antitrust complaint could impact how major soware companies integrate new services into their existing product offerings. It highlightes the ongoing regulatory focus on potential anti-competitive behavior in the technology sector. The legal proceedings are expected to examine the competitive landscape for workplace communication tools. This article is intended for informational purposes only. It does not constitute investment advice.