Amazon’s Cloud-Computing Empire Faces Threat From Edge of the Network

Shifting computer power closer to mobile devices could create $4 trillion market

Photographer: Ben Torres/Bloomberg
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Three companies — Amazon.com Inc., Microsoft Corp. and Alphabet Inc. — quietly dominate the world of cloud computing.

With more more than 100 giant data centers worldwide, they rent out computing power to all manner of customers, making billions of dollars along the way. In fact, cloud computing has done more to fuel Amazon’s earnings in recent years than its e-commerce business.