The UK's Competition and Markets Authority (CMA) has determined Britain's cloud market shows too many anticompetitive traits, with Microsoft and AWS each holding around 30-40% of the UK market in 2024 and hyperscaler concentration especially high in infrastructure-as-a-service.

The UK’s cloud computing market is “not working well” and conduct requirements should be considered for the sector’s two main players, Microsoft and Amazon, according to the competition watchdog.The final report from an independent inquiry group of the Competition and Markets Authority (CMA) has found that Microsoft and Amazon Web Services (AWS) are hurting competition in the cloud computing sector.

Microsoft Corp. and an Amazon Web Services Inc.’s dominance in the cloud services market must face an antitrust investigation under the UK’s new rules for digital markets, the country’s watchdog said after a 21 month long investigation.