Diagram created by the author, Rabia Sajal Niazi

The top three best cloud service model are described below:

1. IAAS ( Infrastructure as a service )

• Most basic cloud computing services category.
• Build pay-as-you-go IT infrastructure by renting servers, virtual machines, storage, networks, and operating systems from a cloud provider.
• Instant computing infrastructure, provisioned and managed over the internet.
• PAAS (Platform as a service)

• Platform as a service (PaaS) is a middle ground between renting space in a datacenter (infrastructure as a service) and paying for a complete and deployed solution (software as a service).
• In a PaaS environment, the cloud provider maintains the physical infrastructure, physical security, and connection to the internet.
• They also maintain the operating systems, middleware, development tools, and business intelligence services that make up a cloud solution.
• In a PaaS scenario, you don’t have to worry about the licensing or patching for operating systems and databases.
• PaaS is well suited to provide a complete development environment without the headache of maintaining all the development infrastructure.
• SAAS (Software as a service)

• Software as a service (SaaS) is the most complete cloud service model from a product perspective.
• With SaaS, you’re essentially renting or using a fully developed application.
• Email, financial software, messaging applications, and connectivity software are all common examples of a SaaS implementation.
• While the SaaS model may be the least flexible, it’s also the easiest to get up and running. It requires the least amount of technical knowledge or expertise to fully employ