What are IaaS, PaaS, and SaaS?

  • Post last modified:1 September 2022
  • Reading time:7 mins read
  • Post category:Computer Network
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Cloud Environments have been around for decades and are no mystery. This is no secret that cloud environments are gaining popularity in today’s world. Your files being converted into digitized form does not happen on its own. However, cloud environments are improving with better speed, security, and availability each day.

Cloud computing is the advanced version of cloud environments. Instead of your hard drive, you can store your data and programs on the internet. It would be best to get your data synced and accessed over the internet and web and then use it in all kinds of businesses. In layman’s terms, cloud computing can be termed as the process of managing, storing, and accessing data from the internet instead of a personal computer or local server.

Cloud computing is seen as the fastest adaptive technology and is increasingly gaining importance in the mainstream world. Whether small, medium, or large, every enterprise can benefit from cloud computing. When you save data in a cloud service model, you are saving your data in another person’s data center.

Wondering what IaaS, PaaS, and SaaS are? These are the most common and important types of cloud computing. Since most businesses have been accustomed to cloud computing, IT managers have to face the task of deciding which model of cloud computing best suits their enterprise according to the latter’s objectives, missions, and goals. Let us understand each model in detail and how they differ from one another.

Infrastructure as a Service [IaaS]

Infrastructure as a service is one of the layers of cloud computing programs. Customers can outsource their information technology infrastructures such as processing, networking servers, virtual machines, storage, and other resources. IaaS can serve as an advantage to many organizations as it saves time, is cost-effective, and is quality efficient.

Suppose IT managers start using infrastructure as a service. In that case, you can reduce maintenance costs on physical data centers, save costs on hardware, and get an insight into the real-time business. IaaS offers you solutions to scale your resources related to IT up and down pertaining to the demand. You can pay for a particular resource as long as you are using it. This way, your organization’s fixed costs are reduced, and data is stored in digitized form. It is related to the pay-as-you-go model. Standard applications of IaaS are laid down as follows:

  • Web Apps: IaaS equips you with all the infrastructure required to run a web-based application. 
  • Big Data Analytics: As you might be familiar with how big data is taking over in today’s world, big data processing is a critical aspect and requires large infrastructures. IaaS is equipped with such complex infrastructures that are needed during the process. 

Organizations are no longer required to maintain IT infrastructure. IaaS comes in three different models: public, private, and hybrid cloud. Some of the IaaS service providers include Reliance Communications, Amazon Web services, Netmagic solutions, Rackspace, and many more.

Platform as a Service [PaaS]

Platform as a service is the second model of cloud computing program where developers can totally rely on a cloud provider and essentially rent everything required to build an application. The cloud provider provides you with tools, resources, infrastructure, and operating systems on a pay-as-you-go basis.

The principal applications that PaaS offers are development tools, middleware, operating systems, database management, and infrastructure. You can access these resources through an internet connection, and you do not need to worry about managing the infrastructure as the cloud service provider handles the back-end scalability.

Popular PaaS service providers include Openshift, AppFog, Windows Azure, and Google App Engine. PaaS gives you the advantage of prebuilt business functionality where you need not build everything from scratch and can directly start the projects.

Software as a Service [SaaS]

SaaS, short for software as a service, is slightly different from PaaS and IaaS. SaaS provides software to users by subscribing to an application rather than purchasing it once and installing it. Users can use an internet connection and log onto a software as a service application as and when required from any compatible device. The SaaS application can be accessed through any website or an app. SaaS is highly cost-effective as well as it cuts down on IT overheads and high infrastructure costs. The only cost that the business suffers is the subscription cost to the application.

Also known as on-demand software, some applications of SaaS are social media and mail services. The SaaS applications also cut down on investment as less hardware is required to access it. SaaS offers multi-device support and can be accessed from any device such as phones, laptops, tablets, etc. However, SaaS may provide some security and latency issues to the users. Some examples of SaaS applications include Microsoft Office 365, Google Apps, NetSuite, and Oracle CRM.


The cloud is a popular topic among business enterprises and covers a lot of online territories. Every cloud model offers its own set of advantages and disadvantages. It is up to you to choose the best alternative for your enterprise. Whatever you need to accomplish, cloud service offers you the required services.

Like many other fields, there are a number of online cloud computing courses that offer you the necessary knowledge and skills for learning cloud computing. The demand for online courses has been increasing in recent times as you can access them from anywhere and at low costs, and online courses are highly flexible and time-efficient.

Acquiring skills related to cloud computing will put you on a fast-growing career path. Many companies are increasingly looking for candidates relying on cloud services and hiring positions like cloud database specialists, cloud architects, and multi-cloud technologists. Many professionals in the information technology field can get themselves a career in cloud computing.

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