IaaS, PaaS and SaaS in cloud computing


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Easy way to understand SaaS, PaaS and IaaS

Since the advent of cloud computing and services, businesses from all over the world are moving away from traditional on-premise services. The cloud has revolutionized the way businesses work, enabling them to connect to IT platforms, applications, and infrastructure via the Internet. In the case of organizations wishing to move their ecommerce businesses to the cloud, the following terms need to be understood. Infrastructure as a Service (IaaS), Platform as a Service (PaaS), Software as a Service (SaaS). Cloud computing exists in three main forms today. IAAS gives access to the resources like virtual machines and virtual storage. PAAS give access to run time environment to deployment and development tools for application. SAAS give access to the end user. 


It is a service model that provides visualized computing resources over the internet.

saas, paas, iaas

Service providers handle as much or as little of the stack as you do relative to the service provider for IaaS, PaaS and SaaS. Every model has its pros and cons, depending on what you need in terms of flexibility and customization. An unmanaged IaaS solution, for example, requires more monitoring than a fully integrated SaaS application, which provides complete control and flexibility over the deployment of virtually any workload.  You’ll choose your model largely based on the needs of your IT operation and the characteristics of the particular applications you have. Following are the three “as a service” models compared with the “on-premise” model. Listed below are the services provided by each of the three service models.

Let’s take a look at each of the service models,


The SaaS platform involves software that can be accessed via the Internet via third parties. Alternatively called cloud application services. This platform uses many cloud computing services, utilizing a web browser to deliver an entire application. The provider carries out updates, bug fixes, and general software maintenance, while users connect via dashboards or API. Group access to the program is smoother and more reliable because no software needs to be installed on individual machines. In addition to its many benefits, SaaS is an excellent choice for organizations without the resources to handle software installation and maintenance. 

SaaS has limitations, such as unpredicted interruptions for critical patching, and minimal end-user customization. Most SaaS packages require the installation of specific operating systems, web browsers or software interfaces that are beyond the expertise or knowledge of most users.


However, you should make sure that you choose a provider you can trust, as SaaS has advantages such as time and cost savings, but it can have disadvantages like control, security.


A few popular SaaS providers are:

1. Slack

2. Dropbox.

3. Hubspot.




Internet-based software and hardware are the main components of PaaS. Essentially, Platform-as-a-Service (PaaS) offers on-premises infrastructure management but at a lower cost. In this instance, the provider hosts the hardware and software, delivering the platform to the user through an integrated product. In most cases, PaaS is a useful service for developers and programmers, as these services allow users to create, run, and manage their apps with no need to construct or maintain any infrastructure. Without the hassle of updating software or maintaining hardware. Build and deploy your applications in an environment provided to you. It is often referred to as an unscaled version of IaaS, since it offers a wider range of services, including servers, networks, and storage, all provided by a third-party provider. 

As an organization, you have no control over data protection or network bandwidth, which may result in adverse unforeseen challenges. This is one of the major limitations of PaaS.


A few popular PaaS providers are:


1. Google App Engine.

2. OpenShift.

3. Windows Azure



Storage, networking, virtualization, and networking are some of the primary services associated with IaaS. On-premises infrastructure is being replaced with infrastructure as a service. An infrastructure service provided by a third party allows you to pay as you go for resources, including storage and virtualization, when you need them. A provider provides you with access and management of the network, servers, virtualization, and storage you need, while you are responsible for the operating system, data, applications, middleware, and runtimes. Your provider takes care of maintaining and updating your on-site data center on your behalf. An application programming interface (API) or dashboard allows you to control the infrastructure. As you need, you can increase or decrease the number of components as needed with IaaS. Using IaaS is very affordable since there is no overhead or maintenance cost. 


IaaS providers may encounter security issues and service reliability issues if they share infrastructure resources with multiple clients. When choosing a reliable and trustworthy provider with a solid history and reputation, these drawbacks can be avoided. 

In order to ensure your budget, efficiency, and workload are on target, you should always run a Return on Investment (ROI) formula. When features, products, and compute resources change, some time will be required to train the users and administrators.


IaaS providers examples are:

1. AWS EC2.

2. Google Compute Engine (GCE).

3. Microsoft Azure.

4. VPSie


Due to the popularity of these cloud service models, on-premise hosting has become less necessary. With businesses and technology merging, organizations that want to stay competitive tend to move to the cloud or establish a hybrid model

Cases where on-premise is considered the best option:-

Data Sovereignty: where the understanding that data is stored outside of an organization’s host country and still subject to the laws in the country where the data are stored. (GDPR & CCPA are good examples)

Data Security: No matter how strict is the contract with the cloud provider, They all abide by the regulatory requirements of the residence country where the data is stored 

Litigation (search warrants): No Cloud providers do follow forcing access to your company storage without your consent to search for artifacts that support an investigation.  Electronic materials that are strategic to the company’s operation may not be appropriate for Cloud storage

Bandwidth overhead: This cost varies dramatically by region from $0.20 to $30/Mbps commercially so in some situations cost of bandwidth to access the cloud could be an overhead that could be reduced on-premise

Control: You own the control over the hardware, data, and security layers

Reduced attack surface: This Data is stored in your own data centers and access is mostly internal (intranet) and restricted to authorized entities while on the other end cloud providers have well-known IP scopes that are scanned thousands of times per day for legitimate and non-legitimate reasons

With VPSie offering the whole platform as a turnkey on-premise solution providing the benefits of both worlds, Having an affordable upfront investment and all benefits of the cloud while maintaining security and controls on-premise with ability to become your own cloud provider within your own datacenter and providing the full-line of cloud services to your business clients at the same time.

We hope this article added some clarity to understanding how cloud model responsibilities are defined in comparison to on-premise options.

We appreciate you spending time reading this article. It was our hope that you found it informative. Get in touch with our professional team to evaluate which option may be right for your business

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