What is SaaS (Software as a Service)?
Software as a Service is a software distribution model in which a third-party provider hosts applications and makes them available over the internet. One of three main categories of cloud computing, a SaaS model system is managed entirely by a third-party provider.
How is Software as a Service (SaaS) different from Platform as a Service (PaaS) and Infrastructure as a Service (IaaS)?
While all three are cloud computing models that use the internet to deliver some or all of its services, the main difference lies in which services a provider manages and what a company manages. In the case of Software as a Service (SaaS), a third-party provider manages all services that are part of the system.