Functions-as-a-Service (also referred to as “serverless”) is a server packaged as a logic execution engine, so the IaaS reservation is hidden by the PaaS service. All tracked CSPs offer functions as a service: Alibaba Function Compute, Amazon Lambda, Google Cloud Functions and Microsoft Functions / Microsoft Event Grid.

A large solid dot indicates that serverless functions are available in that region. A small empty circle indicates that no serverless functions are present in that region.