Runtime as a Service (RaaS) is a cloud service offered by cloud service providers
(CSP). The RaaS service differs from other cloud services by the billing model. Only the pure computing time is billed and not the cloud resources. This means that users of the RaaS service only pay for the actual usage. If no computing operations take place during a certain period, then no costs are incurred. However, if many users use the RaaS service at the same time, the costs increase dramatically.