BugRaptors Blog

Cloud Computing Models: Saas, PaaS, and IaaS Explained

March 2 2021, 06:35am

Posted by Claire Mackerras

Due to the rise of modern and more innovative technological trends, cloud computing becomes an excellent substitute for the centralization of computer services under one server.

If you’re the person who is planning to move your business to the cloud or ready to acquire the benefits that cloud computing offers, you need to understand the three service models of cloud computing like Saas, Paas, and Iaas solutions, their comparisons, testing process, and much more information in detail.


Saas refers to Software as a Service that is a software licensing and delivery model in which software licensing is provided based on subscription, and it is hosted from the center.

Saas (Software as a Service) is also popular as cloud application services, “software plus services” by Microsoft, and an “On-demand software” that is used by businesses in the cloud market.

PaaS (Platform as a Service)

Paas in cloud computing is a Platform as a Service that is a complete development and deployment environment with resources in the cloud, which allows you to deliver everything from simple to sophisticated cloud-based apps.

Like Saas, you need to purchase the PaaS from the cloud service provider and pay-as-you-go basis, and finally, you can access the resources over a secure internet connection. PaaS involves infrastructure that are servers, storage, and networking, including development tools, middleware, database management systems, business intelligence (BI) services, and more.


IaaS is defined as Infrastructure as a Service, an instant computing infrastructure supplied and managed over the internet. It offers a standardized way of obtaining on-demand computing capabilities over the web. Its resources involve networks, storage, processing power, and virtual private servers.

IaaS in cloud computing is one of the types, including platform as a service (PaaS), software as a service (SaaS), and serverless. Unlike PaaS, you will pay for what you use. There is no worry of buying and managing own physical servers and other data centre infrastructures.

Read More: SaaS, PaaS and IaaS Advantages

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