The “as-a-service” models are typical of the second wave of the Web 2.0, built on top of cloud computing. Indeed, these models‘ basic premise is to offer a solution to the final customer without having to host it on-premise, with complex implementations and large overhead. Yet while PaaS and IaaS are skewed toward development teams. SaaS has wider applications toward end-users, also in non-technical departments.
Infrastructure as a service (IaaS)
IaaS stands for infrastructure as a service. Together with other “as-a-service” models, the basic premise of this model is to offer a solution to the final customer without having to host it on-premise, with complex implementations and large overhead. The IaaS model provides virtualization, storage, network, and servers where the final user/customer will handle applications, data, operating systems, and run times.
Read Also: IaaS Business Model
Platform as a service (PaaS)
PaaS stands for the platform as a service. Together with other “as-a-service” models, this model’s basic premise is to offer a solution to the final customer without having to host it on-premise, with complex implementations and large overhead. The PaaS model is a form of evolved cloud computing. The provider, together with virtualization, storage, network, and servers, provides middleware and runtime to the user/customer, which only handles data and applications.
Read Also: PaaS Business Model
Software as a service (SaaS)
In the SaaS model, the provider also makes the applications available to the final user on top of the cloud. The applications and data are hosted and maintained with the third-party SaaS provider, enabling the user/customer to have a quick and easy setup and no overhead.
Read Also: What Is SaaS
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