Function as a Service - running individual code functions in the cloud without managing servers. Like hiring a specialist to perform one specific task only when needed.
AWS Lambda is FaaS where you upload a function to resize images, and it runs automatically whenever an image is uploaded.
All are serverless Function-as-a-Service (FaaS) offerings that run event-driven code without managing servers. They differ mainly in supported runtimes, event sources/integrations, scaling limits, networking options, and pricing details, but the core model (trigger -> function execution -> pay per use) is similar.