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.

The dominant position of Amazon and Microsoft in cloud computing is harming competition, with their impact exacerbated by technical and commercial barriers to switching, an inquiry group from Britain's antitrust regulator said.