A revolutionary change in the industry was the foundation of cloud on the automation of virtualization technologies. Initially it was meant for infrastructure, but with the advent of new and innovative cloud services it has crossed the boundary of Infrastructure and invaded the application space. The concept of ‘as a Service’ model has three pillars: IaaS (Infrastructure as a Service), PaaS (Platform as a Service) and SaaS (Software as a Service). Over a period of time cloud services have grown and diversified to the extent that clubbing the services into these three pillars is not only difficult but unattainable. That’s the reason none of the public cloud providers classify their services in ‘as a Service’ model category.