Comment by datums

Depends on your needs. Some larger organizations will have multiple providers for business continuity, multi region is not enough. The smaller organization might decided on a cloud , solely based on pricing. AWS is the giant, followed by Azure and GCE is 3rd. Depending on your orchestration tools, why choose one :) as long as you don't lock yourself into a specific service, you should be able to switch across cloud compute. If you're not using AWS, get the free trial, kick the tires.