Software as a Service is a cloud computing system in which applications are hosted by service provider and made available to customers over a network through Internet.

In this model, we give customers a network-based support, an application for the SaaS. It is a technology that supports service-oriented architecture (SOA) and Web services and Ajax based developments. The important business related softwares could have an easy access through Internet. SaaS provide application level advantage to meet need of consumer browsers with secured and reliable environment. Business firms are facing huge cost for IT Infrastructure and related staff to manage it.