SaaS is an acronym for the term Software as a Service. It is one of the cloud solutions along with IaaS and PaaS. From a service perspective, SaaS means software as a service or subscription software. With on-demand software, there are no high acquisition costs and the IT management and other services or maintenance and updates are handled by the SaaS provider. With SaaS, a user’s customer or employee data no longer resides on the user’s own computer, but with the SaaS provider. However, the user remains responsible for the correct processing of the data in accordance with legal requirements.