SaaS or Software as a Service is a technique in the field of software technology. It enables you to hire any software application only when there is a requirement of such a utility. In other words, it is an on-demand software service provided by the vendors to its consumers. The user need not be troubled with the maintenance blues, when the application is not in use. Moreover, the on-demand service also saves the complex hardware requirements, once the use of the software is over. The SaaS enables a centralized control of the business by the service provider. In other words, the network of action is distributed amongst many users from a single server. Thus, there is lot of sharing. Hence, SaaS is the perfect service to meet the demands of any software consumer. The SaaS also omits re-installing of the software within an organization because of the central control. SaaS products also bring continuous innovation, where new features are being constantly added to the environment as part of the subscription fee and the hardware is run in a higher performing and more secure environment than an organization would be able to provide on-premise.

SaaS is a software application delivery model by which an enterprise vendor develops a web-based software application, and then hosts and operates that application over the Internet for use by its customers. SaaS Delivery model, sets up the delivery organization in such a way, that the key technical processes of Provisioning and Support are also integrated with the Service itself.
Benefits of the SaaS model:

• easier administration
• automatic updates and patch management
• compatibility: All users will have the same version of software.
• easier collaboration
• global accessibility
• Powerful Communication Features
• No Capex
• No maintenance
• Pay as Per use