A billion-dollar lawsuit against Microsoft in the United Kingdom is advancing and challenges the Windows Server cloud pricing policy that may have impacted thousands of companies and favored Azure in the global market.

Written by Caio Aviz

Published on 23/04/2026 at 12:13

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Class action involves thousands of companies and raises debate about competition in the cloud computing market

A billion-dollar dispute involving Microsoft has advanced in the United Kingdom and, at the same time, reignited discussions about competition in the technology sector.

Furthermore, a London court ruled on January 21 that the company will face a class action lawsuit of US$ 2.8 billion, equivalent to approximately R$ 14 billion

This case involves thousands of British companies that use Windows Server on competing cloud platforms, such as Amazon, Google, and Alibaba.

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Class action gathers thousands of companies and expands the case’s scope

Firstly, competition lawyer Maria Luisa Stasi is leading the action on behalf of nearly 60,000 companies.

In this regard, these organizations operate Windows Server on cloud services rivaling Azure, Microsoft’s own platform.

Furthermore, lawyers allege that these companies were overcharged for software usage, which directly impacted their costs.

Therefore, according to the accusation, this practice would have favored Azure in the competitive environment.

Price difference is at the heart of the legal dispute

Furthermore, as argued in a hearing held in 2024, Microsoft would have applied higher prices for users on competing clouds.

On the other hand, Azure customers would have access to more advantageous conditions.

Thus, these additional costs were passed on to end customers, which made Amazon’s AWS and Google Cloud less competitive.

In this way, the licensing model began to be questioned from a competition perspective.

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Court authorizes continuation of lawsuit against Microsoft

However, Microsoft contested the case and stated that there is no viable method to calculate the alleged damages.

Therefore, the company requested the dismissal of the lawsuit.

Nevertheless, the Competition Appeal Tribunal in London certified the process, allowing it to proceed to trial.

Thus, this decision represents an important milestone in the dispute.

Statement highlights impact on involved companies

Following the decision, Maria Luisa Stasi declared that the case’s advancement represents “an important moment for the thousands of impacted organizations”.

Furthermore, the statement reinforces the collective dimension of the action and its impact on the market.

Therefore, the lawsuit remains one of the main cases related to competition in the technology sector.

Microsoft defends business model and market presence

On the other hand, Microsoft argues that its model is vertically integrated, which can benefit competition.

Furthermore, the company maintains that using Windows Server as the basis for Azure does not harm the market.

Thus, the company states that the cloud sector remains competitive and dynamic.

Regulators expand analysis of practices in the cloud sector

Meanwhile, regulators in the United Kingdom, Europe, and the United States are analyzing similar practices in the market.

Additionally, in July 2024, the UK Competition and Markets Authority (CMA) pointed out that Microsoft’s practices reduced competition.

According to the report, these actions would have materially disadvantaged AWS and Google Cloud.

However, Microsoft stated that the market remains competitive.

New investigation reinforces regulatory pressure on the company

More recently, in December 2024, the CMA announced that it would open a new investigation into software licensing in the cloud sector.

Thus, the move reinforces regulatory attention on the topic.

Therefore, the current scenario indicates a broader analysis of industry practices and their impact on competition.

Given this context, a central question arises for the market: to what extent can the licensing model influence competitiveness in cloud computing?

A billion-dollar lawsuit against Microsoft in the United Kingdom is advancing and challenges the Windows Server cloud pricing policy that may have impacted thousands of companies and favored Azure in the global market.

Class action involves thousands of companies and raises debate about competition in the cloud computing market

Class action gathers thousands of companies and expands the case’s scope

Price difference is at the heart of the legal dispute

Court authorizes continuation of lawsuit against Microsoft

Statement highlights impact on involved companies

Microsoft defends business model and market presence

Regulators expand analysis of practices in the cloud sector

New investigation reinforces regulatory pressure on the company

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A billion-dollar lawsuit against Microsoft in the United Kingdom is advancing and challenges the Windows Server cloud pricing policy that may have impacted thousands of companies and favored Azure in the global market.

Class action involves thousands of companies and raises debate about competition in the cloud computing market

Class action gathers thousands of companies and expands the case’s scope

Price difference is at the heart of the legal dispute

Court authorizes continuation of lawsuit against Microsoft

Statement highlights impact on involved companies

Microsoft defends business model and market presence

Regulators expand analysis of practices in the cloud sector

New investigation reinforces regulatory pressure on the company

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