saas iaas paas

The difference between PaaS, IaaS, and SaaS

Anyone in a business, whether big or small, usually tend to cut on unnecessary costs as much as they look forward to making more and more profits. However, the organization can only achieve this through cloud application development. The service enables business setups to change to virtual management from the physical control of resources with ease. Globally, the public cloud service market is set to have a significant growth in 2020 from 2019 statistics.

However, there are many cloud-based services out there, which include Paas, Iaas, and Saas. Many business persons tend to have a hard time trying to choose the best for their businesses. There are significant differences between the three cloud services meant for different functionalities. For these reasons, this article is intended to reduce your doubts and select the perfect cloud service to achieve the goals for your business.

But before we discuss the differences between the three cloud services, we must understand what cloud computing is.

Defining Cloud Computing

The fact about cloud services is that it minimizes costs related to IT infrastructure. The service is on the rise because businesses can request and access the hardware and software of the system with ease. Services that can be accessed include data storage and computing power over the internet. All these advantages can be related to the phrase,” Anywhere you go, the cloud follows.”

What cloud computing does is that it helps businesses minimize the control of computing resources to give them time to concentrate on business development activities.

Note: Cloud can be made for access by several organizations, meaning public cloud. Cloud can also be made for a specific organization, meaning the enterprise cloud. The cloud-based services, which include Paas, Iaas, and Saas, offer beneficial services; hence they fall under public cloud service.

The difference between Paas, Iaas, and Saas Cloud Computing Models

The main cloud-based computing services, PaaS, IaaS, and Saas, are improving business operations worldwide. First of all, they are known to reduce the cost of IT infrastructure while transforming your digital experience at the same time. Outlined below are the differences between the PaaS, IaaS, and Saas cloud-computing services.

PaaS – (Platform as a Service)

Platform as a service is perfect for software developers. The benefit of PaaS is that it is compatible with different languages for programming, and it has full control to create custom software. However, the disadvantage of PaaS is that it is not quite flexible when compared to IaaS

The main function of the platform as a service (PaaS) is to give a useful framework for developers to manage new product apps, to build the app, and also testing of the applications. Developers find it easy to use PaaS because it serves the database, application tools, and operating system that are required for the app development at the same time. This implies that there is no need to have the resources differently, thus, saving more time and resources.

Many developers love PaaS because it gives them a platform to build apps that can be provided as a Saas solution. The best example of PaaS is the giant Google App Engine. With Google App Engine, applications can be easily created and hosted without any difficulty.

Note: PaaS is accessible on a pay-as-you-go rule, meaning that you pay for the resources you have subscribed to. You only work on the built application since the vendor deals with the rest.

Features of PaaS

  • PaaS is a multi-tenant design
  • The interface is based on the web
  • PaaS offers services to build, test, setup, host, and maintain apps

IaaS – Infrastructure as a Service

The primary function of Infrastructure as a Service is to provide visual data centers to businesses. This cloud service is suitable for IT administrators. IaaS offers a full infrastructure, the server, and the storage space where new technologies and experiments are conducted over the cloud. With IaaS, you can perform data mining analysis, host a website and software solution, and creating virtual data centers for large scale enterprises.

In IaaS, the vendor works on networking resources, storage space management, and the dedicated data center. On the other hand, the business is working on specified tools for development, managing apps that are hosted, and deployment of the operating system.

Amazon Web Services is an excellent example of using IaaS, which is the top public cloud space. Apparently, Netflix and Salesforce brands are moving towards Amazon Web Services to support the customer base that keeps growing every other day.

Advantages of IaaS

  • It is cost-effective
  • It can still operate even if the server goes down
  • It is flexible enough
  • The main focus of IaaS is how to grow and expand a business
  • There is no need for regular upgrade of software, hardware resources, or even troubleshoot equipment issues. It has on-demand scalability

Disadvantages of IaaS

  • IaaS is highly dependent on third-party or the provider for the data.
  • There is no cloud security control in IaaS
  • Sometimes organizations fail to access to data and applications due to technical issues
  • Some of the businesses software does not get upgraded
  • IaaS restricts customizations and users don’t have privacy
  • The IaaS service provider is sophisticated, hence requires only professionals

Saas- (Software as a Service)

Software as a Service cloud service is hosted by the service provider, which is available to the consumers based on the pay-as-you-go. SaaS cloud service is suitable for consumers across different localities. The software license is open on either yearly or monthly subscriptions, and it can be accessed via a browser with stable connectivity of the internet.

Some of the business apps that use SaaS include the following:

The primary function of SaaS product development is to provide cloud-based apps to consumers. Dropbox, which is known for sharing and downloading files over the network and Google Docs, which is known for creating and sharing documents over the web, are perfect examples of SaaS cloud services.

If you are in digital businesses, you should consider SaaS in cloud computing to enjoy zero management since the vendor handles all activities. Another reason to consider Saas cloud services is how easily it creates solutions whenever technical issues arise.

Advantages of SaaS

Cost-effective: Since Saas works on a subscription basis, users don’t have to pay for an up-front fee for licensing; hence, no initial costs. Also, it is the Saas provider that manages IT infrastructure meant to run the software; therefore, no software and hardware maintenance fees.

Upgrades are easily deployed– As a user, you are relieved the work of implementing upgrades, hardware, and software updates. SaaS service providers do the job.

Scalability – There is a wide range of SaaS options for subscription, and you can always change any moment. For example, when your business shows growth, you can change the subscription plan because it will mean more users need access to the business.

It is easily accessible – You only require internet connectivity and a browser to access the Saas app. The requirements are available on multiple devices across the world, meaning that Saas is easily accessible.

Faster set up and deployment – The process of setting up and deploying SaaS is quick 0 because the service is already installed and configured in the cloud. This reduces delays experienced in the traditional software installation process.

Disadvantages of SaaS

Data and security issues – There is no privacy of sensitive information in hosted and cloud services.

Restricted range of apps – As much as SaaS has gained popularity, there exist several apps that do not offer a hosted platform.

Performance – At times, Saas may experience slow speed than on serve apps because the software is not hosted on a local machine.

Internet requirement – SaaS relies heavily on a stable internet to deliver web services. In case the internet connection fails, you can’t access the software data or, even worse, lose the data.

Having highlighted IaaS, PaaS, and SaaS, you will realize that all the cloud-based services are meant for different functions. It all depends on the needs and requirements of your business. Although it becomes a bit tricky to distinguish the threes, all you need to do is read and understand the basics of each cloud-based service. Know the feature, benefits, and the downfall of each. From there, you can determine the best service for your business.


You will require the IaaS service when starting a website to help you host the applications. However, you will need PaaS service if the purpose of your business is to build a custom software product. When the product is done, it will be termed as SaaS product, ready to be used.

You will notice that IaaS, PaaS, and SaaS are independent of one another to run the operations of the business. When choosing the service, know well the needs and requirements of your business and select appropriately. To succeed in your business, it will depend on how you use the services.

Good luck as you plan to uplift your business with amazing cloud-based services; Iaas, Paas, and SaaS.

Contact Aalpha today if you need further information.


Written by:

Stuti Dhruv

Stuti Dhruv is a Senior Consultant at Aalpha Information Systems, specializing in pre-sales and advising clients on the latest technology trends. With years of experience in the IT industry, she helps businesses harness the power of technology for growth and success.

Stuti Dhruv is a Senior Consultant at Aalpha Information Systems, specializing in pre-sales and advising clients on the latest technology trends. With years of experience in the IT industry, she helps businesses harness the power of technology for growth and success.