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IaaS vs PaaS vs SaaS, What’s the Difference?

IaaS vs PaaS vs SaaS

IaaS, PaaS, SaaS are all terminologies being used in the Cloud. Data has to be stored in one way or the other, being it On-Premise or in the Cloud. If Data is stored in the cloud, it has to follow one of these three standards:

  • Infrastructure as a Service (IaaS)
  • Platform as a Service (PaaS)
  • Software as a Service (SaaS)

You may have probably heard of these terms before but they’ll only become more popular as more businesses move to the Cloud.

We would look at the various concepts, benefits, and differences surrounding those three cloud technologies.

Key Differences:

Difference between SaaS vs PaaS vs IaaS

Not so long ago Companies of IT Systems were required to manage all aspects of Hardware and Software services. Gradually companies of IT systems have been migrating to the cloud.

1) Iaas:

Infrastructure as a Service (IaaS), IaaS allows businesses to have services that are on-demand rather than buying extra Hardware. IaaS customers can manage and structure their architecture without having to make changes to physical Hardware. These changes are mostly Logical. IaaS is pay-as-you-Go based usually.


IaaS is delivered over the internet. The service providers give clients the COmputer Infrastructures (Routers, Switches, Hubs, LAN Cables), Storage usually via Virtualization, the client usually receives this via a Dashboard or an API call. This saves the company from maintaining Data Centres and Server Farms. But unlike PaaS or SaaS, the client manages aspects such as the O/S, Data and the Applications that run on these IaaS systems.


  • Variable Cost depending on the usage
  • Maintaining an IT Infrastructure is costly
  • Less Overhead in accessing your platforms and Data, you don’t need an independent Contractor for that.
  • Little Overhead and configuration as many users can access your platform and make corrections.

When to use IaaS: 

Let’s say you’re a small company and you’ll like to minimize cost on Servers, and also Application maintenance. With IaaS you can only purchase what you consume. This is evident during the Network peak periods such as Christmas or even the Thanks Giving periods, instead of buying extra Hardware, you can just pay for what you consume during that period.

Example of IaaS: 

Some great examples of IaaS:

Disadvantages of IaaS: 

  • Although the Service providers host these Servers, it’s up to the clients to configure them.
  • Security risks, from insecure passwords created on these platforms.

2) Paas:

Platform as a Service (PaaS), they provide cloud services to developers. PaaS provide a framework in which developers can build upon and create customized apps. 


PaaS is delivered over the web. The developers don’t have to worry about the Servers and the OS, Virtualization technologies running on these Servers.


  • Access to many users (Availability)
  • Scalable
  • No configuration needed to maintain the Hardware resources.

When to use PaaS:

Let’s say you have an E-commerce project that involves multiple Developers from all over the World working in different tie zones, with the great Speed and Flexibility of PaaS, you can easily integrate and manage these developers all in one place.

Example of PaaS:

Some great examples of PaaS include:

Disadvantages of PaaS:

  • You would have to confirm the versions of Softwares running on the PaaS platform before you begin programming, as issues may arise from conflicts and Lack of Resources.
  • Limited Capabilities as the platform you develop may tend to surpass the cloud limits provided for your PaaS system.

3) Saas:

Software as a Service (SaaS), is the most commonly used cloud computing services by businesses to grow and expand their business. It’s delivered over the internet


SaaS is delivered over the web. 


  • Zero Installation costs, all you need to do is access your user accounts
  • Easy to use and maintain
  • IT staff can now focus on other pressing things in the Organization such as Sales and Marketing.

When to use SaaS:

Startups or companies that want to launch for example an E-Commerce website and they don’t have time to do the configuration and maintenance of Servers and the IT infrastructure. Applications that aren’t needed too often, for example, Tax Softwares like QuickBooks.

Example of SaaS:

Some great examples of PaaS include:

Disadvantages of SaaS:

  • Lack of control over your data, this may happen when the service providers don’t follow government policies.
  • Minimal Customization because you use only what has been programmed. if you want extra functionalities, usually you’ll need to consult the Service providers for them to provide you with this service, this may take a longer time for them to fulfill this service.

If you need help in maintain or configuring your PaaS, IaaS, website Development,  or need more understanding of the insights of SaaS, feel free to Contact Us.

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