Software as a Service (SaaS) is a strategy for utilizing the product by organizations and invested individuals where the product is facilitated by the merchant of the product and is conveyed to the clients through a web program on the web. It is basically a software distribution model in which, a third party hosts its application over the internet for its customers. There are three main categories of cloud computing. Software as a Service (SaaS) is one of them. Another two are, IaaS (Infrastructure as a service) and PaaS (Platform as a service).
SaaS is a method in which a software can be delivered to its customers anywhere and anytime, providing, customers should have an internet connection and web browser. In this model, vendors maintain the database, servers and the code of the applications. There are many names for this like "on-request", "remotely-facilitated" and "Application specialist organizations (ASP)".
When Saas was first developed, its customization was little difficult. But now, as it is growing, it is becoming much easier to customize your SaaS systems. Before getting the services, you sign a service level agreement (SLA) with the SaaS providers. In this, SLA provides some parameters including the ownership. SaaS vendors invest a lot in backups, security, and maintenance. It is cost saving, scalable and is accessible anytime, anywhere.
Software as a service, which is a cloud service, is completely scalable. It means that it allows the customer to use more or use fewer, as per their demands. On-demand service is always available.
There is no amount of money invested in any type of SaaS service. As far as the processing power is concerned, it is always supplied by the cloud provider. Applications are ready to use once the customer subscribes.
Instead of buying a new software, customers can fully depend on the providers for updates. The provider will perform updates time to time and customers need not to worry about anything.