Microsoft - Lawsuit
Executive Summary
Salesforce's Slack filed an antitrust lawsuit against Microsoft in London's High Court on April 23, 2026, alleging that Microsoft illegally bundled its Teams messaging app with Office products to stifle competition and limit customer choice. This follows a 2020 complaint to the European Commission that led Microsoft to agree last year to offer Office without Teams at reduced prices in Europe. The lawsuit could affect businesses by potentially expanding their options for workplace collaboratio...
What Happened
Salesforce's Slack filed an antitrust lawsuit against Microsoft in London's High Court on April 23, 2026, alleging that Microsoft illegally bundled its Teams messaging app with Office products to restrict customer choice and harm competition. This legal action follows a 2020 complaint Slack made to the European Commission regarding the same bundling practices. Microsoft had previously agreed with the European Commission in 2025 to offer Office products at reduced prices without Teams included in Europe to avoid penalties.
Who Is Affected
Businesses using Microsoft Office and Teams products are affected, particularly those in the UK where the lawsuit was filed and throughout Europe where prior regulatory actions took place. Organizations may have been compelled to use Teams even when they preferred alternative workplace messaging platforms like Slack, potentially limiting their ability to choose communication tools that best fit their operational needs. The outcome could influence pricing and product bundling options available to corporate customers purchasing workplace collaboration software.
Why It Matters
This lawsuit represents a significant challenge to bundling practices by dominant technology platforms, which can restrict market competition and user choice in workplace software. The case builds on growing regulatory scrutiny of Microsoft's market practices, as evidenced by the concurrent mass lawsuit in the UK alleging overcharging for Windows Server software in cloud environments. If successful, the litigation could establish important legal precedents regarding how large technology companies package and sell integrated software services, potentially forcing changes that increase customer options and competitive alternatives in the enterprise software market.
What You Should Do
Businesses currently using Microsoft Office should review their software licensing agreements to understand whether they are paying for bundled Teams access they may not want or use. Organizations dissatisfied with forced bundling should document their concerns and monitor the lawsuit's progress, as a favorable outcome could provide options to purchase Office products separately from Teams at reduced costs. Companies should evaluate alternative workplace collaboration tools to determine if competitors like Slack better meet their needs, and consider providing feedback to their Microsoft account representatives about product bundling preferences to demonstrate customer demand for unbundled options.
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