Difference Between IaaS, PaaS, and SaaS

By BYJU'S Exam Prep

Updated on: September 25th, 2023

The difference between IaaS, PaaS, and SaaS is that IaaS is used by system managers, PaaS is used by deployers and developers, whereas SaaS is used by business users. The three most popular cloud service offering categories are IaaS, PaaS, and SaaS.

Difference Between IaaS, PaaS, and SaaS PDF

The main difference between IaaS, PaaS, and SaaS is that access to resources like virtual computers and virtual storage is provided via IAAS. PaaS provides tools for application deployment, and development is given access to the run-time environment. However, the end user is given access by SAAS. Let us discuss the difference between IaaS, PaaS, and SaaS.

Difference Between IaaS, PaaS, and SaaS

IaaS, PaaS, and SaaS are the three main types of cloud computing present today. The difference between IaaS, PaaS, and SaaS are mentioned in the table below.

IaaS vs PaaS vs SaaS

Difference Between IaaS, PaaS, and SaaS




The full form of IaaS is Infrastructure as a service.

The full form of PaaS is Platform as a service.

The full form of SaaS is Software as a service.

Users of the IaaS service have access to a variety of resources, including virtual machines and storage.

Users can access a runtime environment by utilizing the PaaS services (for the development and deployment of applications and tools).

The end users of SaaS services have access to all of their services, including storage, application hosting, and other services.

It demands technological expertise.

The fundamental setup needs some expertise.

Technical expertise is not necessary because everything is handled by the company.

IaaS is particularly well-liked by scientists and programmers.

Developers who primarily work on app and script development frequently use PaaS.

Consumers and businesses frequently use SaaS services for networking, file sharing, email sharing, and other purposes.

Cloud services include VCloud Express, Sun, and Amazon Web Services.

Cloud services include Google and Facebook.

Cloud services include Google and Facebook apps, and MS Office Web.

IaaS, PaaS, and SaaS

There are three key terms that firms who are thinking about shifting their e-commerce operations to the cloud should be aware of:

  • Technology as a Service (IaaS)
  • Software as a Platform (PaaS)
  • Service-based software (SaaS)

IaaS, PaaS, and SaaS do not compete with one another. Most major corporations use all three, while most mid-sized organizations frequently use more than one.


IaaS, or infrastructure as a service, is an alternative to on-premises infrastructure. It is a pay-as-you-go service where a third party offers you cloud-based, internet-based infrastructure services as you require them, including storage and virtualization. IaaS solutions are very versatile and accessible, and they can be changed whenever necessary without costing you money.

IaaS also gives you back control over the infrastructure, which is an additional benefit. You won’t need to depend on an outside IT contractor because you can access and manage IaaS products on your own without needing to be an IT expert.


Full, on-premise infrastructure management is one step closer to platform-as-a-service (PaaS). It is a scenario in which a provider hosts the hardware and software on its own infrastructure and provides the user with this platform as an integrated solution, solution stack, or service over the internet.

Developers who are creating software or applications are the main users of PaaS. When developing apps, developers don’t have to start from scratch thanks to a PaaS solution, which saves them time and money by preventing them from having to write voluminous code.


The most complete type of cloud computing service is software-as-a-service (SaaS), commonly referred to as cloud application services. SaaS delivers an entire program that is managed by a provider via a web browser.

SaaS is a fantastic choice for programs that don’t need significant customization, or that will only be used occasionally, as well as for small firms that don’t have the people or resources to manage software installation and updates.

Key Difference Between IaaS, PaaS, and SaaS

These three services—SaaS, PaaS, and IaaS—offer a business many methods to use the cloud. The conventional on-site self-managed IT solutions are replaced by these alternatives. The key difference between IaaS, PaaS, and SaaS is given below.

  • Pay-as-you-go options are available for storage, networking, and virtualization with infrastructure-as-a-service.
  • Additionally, Platform-a-a-Service offers web-based hardware and software development tools.
  • The highest level of vendor management is offered by software-as-a-service, which offers comprehensive software solutions.
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