LeverOS seems to be an open source implementation of a lambda service for running event-driven, &quot;serverless&quot; applications, aka an implementation of the idea that drives AWS Lambda, Google Cloud Functions, Azure Functions.<p>The Serverless Framework is one of several frameworks for writing serverless applications.  The name of this framework is unfortunate as &quot;serverless&quot; is a generic term referring to event-driven applications, but has certainly benefited from the confusion that its authors have caused.<p>Those less familiar with these products can look at this as &quot;RPC as a Service&quot;.