Saas vs PaaS vs IaaS: Knowing the differences

February 17, 2021
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When we talk about Saas, PaaS and Iaas we are referring to Cloud Computing Services (building, creating, and storing data over the cloud), one of the key trends in the digital transformation of companies.

Organizations currently opt for this type of pay-per-use services because they imply a reduction in investment in the IT infrastructure and subsequent maintenance. Besides, it also offers some other advantages such as:

Understanding the differences between the 3 most common types of deployment models for cloud services and the business model is what will allow your organization to choose the best option.


Its acronym stands for "Software as a service". With SaaS, the cloud can use third-party software applications and shows them to end users as a service without having to worry about how the infrastructure or even how the underlying software is maintained because the vendor handles the configuration of the hardware and software needed.

SaaS makes software available over the internet and it makes the connection through the web or an API.

SaaS examples

SaaS Pros and Cons

When to choose SaaS?


PaaS stands for "Platform as a service". PaaS provides runtime environments and deployment tools for implementing applications and the structure to install and access them from the network. It offers a higher level of service, as it facilitates the management and exchange of information between applications.

With PaaS, companies pay to use a platform on which to develop, manage, distribute and test applications, while developers can work without worrying about software updates, operating systems, storage, or other infrastructure-related details.

PaaS examples

PaaS Pros and Cons

When to choose PaaS?


IaaS stands for "Infrastructure as a Service" and is the lowest layer of cloud computing, i.e. the one closest to the hardware. It provides an infrastructure service where your company will pay only for the usage, and it is unnecessary to have the physical infrastructure to maintain all the data. IaaS is an outsourced “virtual data center” in the cloud.

This service provides resources such as physical and virtual machines, basic storage (disk space) and computing capabilities. It also provides access to load balancers, software, virtual machine disk storage, and virtual local area networks (VLANs).

Users have access to these resources through server virtualization.

IaaS examples

IaaS Pros and Cons

When to choose IaaS?

Final thoughts:

Source: Big Commerce

The best option between IaaS, PaaS and SaaS will always be the one that best suits the needs of the business and the abilities that we have to generate a part of the services by ourselves since depending on the choice we make, we exclude the provider from some responsibilities or others. 

Summarizing what we have seen in this blog, we can say that IaaS provides access to resources such as virtual machines and virtual storage, while PaaS provides execution environments, development and deployment tools for applications and SaaS provides software as a service for end users.

And talking about the end customer, consider that IaaS is aimed for SysAdmins and Network Architects (Migrate to IT), PaaS is aimed at Application Developers (Build on IT) while SaaS is for End Users (Consume IT).

Finally, do not forget that:




Is a middle ground



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