People tend to use the terms SaaS vs Cloud services as interchangeable notions and this is wrong. The first thing you need to remember is that Cloud and SaaS are not equivalent.
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SAAS means the software as a service.
The service is used for providing third-party host applications by using a software distribution model.
It ensures the features’ availability to the customers on the internet.
It has three classifications; cloud computing, infrastructure as a service (IAAS) and platform as a service (PAAS).
It is used for an application service provider (ASP) and software delivery models.