• Infrastructure as a Service (IaaS)

Infrastructure as a service (IaaS) is a cloud computing service model wherein computing resources are hosted in either a public, private, or hybrid cloud. The IaaS model allows companies to move some or all of their on-premises or collocated data centre infrastructure to the cloud, where it is owned and managed by a cloud provider. Compute, network, and storage hardware, as well as other components and software, can be included in these cost-effective infrastructure aspects.

The cloud provider owns and operates the hardware and software, as well as owning or leasing the data centre, in the IaaS model. When you use an Infrastructure as a Service (IaaS) solution, you rent compute and storage resources, provision them as needed, and pay for the resources your company uses. You'll have to pay for some resources, such as compute. You'll pay for capacity in other cases, such as storage.

What Makes IaaS Different from Other Cloud Services?

Cloud infrastructure at a minimum contains core computing, storage and network resources. Higher-level services (also known as platform as a service [PaaS]) such as relational and NoSQL databases, real-time and batch data processing, developer pipelines and services, containers, and functions have recently been added. IAAS gives access to Hardware resources like virtual machines and virtual storage. PAAS provides application deployment and development tools with access to the runtime environment.

SaaS provides software on a subscription basis.

Read: Major concerns of cloud security

  • Platform as a Service (Paas)

Developers that use the Platform-as-a-Service (PaaS) model license everything they need to build an app from a cloud provider, which includes development tools, infrastructure, and operating systems. This is one of the three cloud computing service models. PaaS greatly simplifies web application development because all backend management is done behind the scenes, away from the developer's view. Although there are some parallels between PaaS and serverless computing, there are many significant distinctions.

PaaS can be accessed via any internet connection, allowing you to create a whole application in your browser. Developers can work on the application from anywhere in the world because the development environment is not hosted locally. This enables teams that are spread throughout the globe to collaborate. It also means that developers have less control over the development environment, but at a far lower cost.

What Makes PaaS Different from Other Cloud Services?

If your project involves several developers and vendors, PaaS is the best alternative. It is simple to build unique apps with PaaS because it licenses all of the necessary computing and networking resources. PaaS is a unique model that streamlines the app development process while lowering your organization's costs.

Furthermore, it is adaptable and provides the essential speed in the process, reducing your development time significantly. PaaS has the downside of giving you less control over data processing because it is built on virtualized technologies. In addition, as compared to the IaaS cloud model, it is less adaptable.

Read: Hybrid Cloud Services | Benefits of Moving to the Cloud

  • Software as a  Service (SaaS)

Software as a Service, or SaaS, is a business model that allows users to quickly access cloud-based applications. The vendor has complete control over the computational stack, which you may access via a web browser. These applications are cloud-based, and you can either pay for a licence or use them for free with limited access.

In your existing computing architecture, Software as a Service (SaaS) does not require any installations or downloads. This eliminates the need to install apps on each of your PCs, with the vendor handling maintenance and support. Google Workspace, Microsoft Office 365, and other SaaS examples are well-known.

What Makes SaaS Different from Other Cloud Services?

SaaS is one of the three most prevalent cloud consumption models, alongside infrastructure as a service (IaaS) and platform as a service (PaaS). Simply put, IaaS provides the building pieces for using cloud services like computation, storage, networking, and monitoring, whereas PaaS assembles these building blocks into an easier to use software development platform. 

SaaS is distinct in that it isn't primarily targeted towards end users. Popular business apps such as email, customer relationship management (CRM), and financial management tools, on the other hand, are accessible on-demand from any web browser, desktop computer, or mobile device.


What is the difference between IaaS, PaaS and SaaS ?





Stands For

Infrastructure as a service.

Platform as a service.

Software as a service.


IaaS businesses offer services such as pay-as-you-go Hardware Infrastructure storage, networking, and virtualization.

Organizations use Paas technologies to construct apps, which are provided by a PaaS vendor over the internet. The majority of PaaS users are developers.

SaaS represents the most commonly utilized option for businesses in the cloud market, Subscription based applications.


DigitalOcean, Linode, Rackspace, Amazon Web Services (AWS), Microsoft Azure, GCP

AWS Elastic Beanstalk, Windows Azure, Heroku, Force.com, Google App Engine, Apache Stratos, OpenShift

Google Workspace, Dropbox, Salesforce, Cisco WebEx, Concur, GoToMeeting


Network architects utilise IAAS as a tool.

Developers use PAAS.

End users utilise SAAS.


It's a service model that uses the internet to deliver Hardware computing resources as a service.

It is a type of cloud computing that provides tools for application development.

It's a cloud computing service model in which the host software /application is used on subscription.


IAAS gives access to resources like virtual machines and virtual storage.

PAAS provides application deployment and development tools with access to the runtime environment.

The end user has access to SAAS.


Characterstics of SaaS, Paas and Iaas

  SaaS PaaS IaaS

The cost varies according to consumption.

The services are extremely scalable.

On a single piece of hardware, there are multiple users.

The infrastructure is fully controlled by the organisation.

Adaptable and dynamic

Because it is based on virtualization technology, resources may be simply scaled up or down as your business changes.

Offers a number of services to aid in the development, testing, and deployment of mobile apps.

The same development application is available to a large number of users.

Web services and databases are integrated.

Administered from a single location

The site is hosted on a remote server.

Internet-based accessibility

Hardware and software updates are not the responsibility of the user.

Resources are offered on a subscription basis.

Benefits of SaaS, PaaS and IaaS

  SaaS PaaS IaaS

The most flexible cloud computing model

Easy to automate deployment of storage, networking, servers, and processing power

Hardware purchases can be based on consumption

Clients retain complete control of their infrastructure

Resources can be purchased as-needed

Highly scalable

App creation and deployment that is simple and cost-effective


Highly accessible

Developers may personalise programmes without having to worry about software maintenance.

There will be a 

significant reduction in the amount of code required.

Business policy automation

Migration to the hybrid model is simple.

The upfront costs of purchasing and installation are eliminated with SaaS.

Upgrades to standard software don't involve any downtime or additional labour hours.

The end-user will always have access to the most up-to-date version of the software thanks to SaaS.

In the unlikely event that one of our data centres encounters a problem, the other data centres will continue to provide services.

Backups and data recovery, with guaranteed levels of service

Easy accessibility and scalability


IaaS vs PaaS vs SaaS: Which Cloud Service Is Suitable for You?

To summarise, choose the cloud model that best fits your company's requirements.

If you need infrastructure control but can't afford your own servers, IaaS is the way to go. You'll go from CAPEX to OPEX as a result.

PaaS makes things easier for software developers, speeding up time to market. Developers will like the platform's useful features.

When you require a tool for a specific purpose, such as a CRM, email, or collaboration software, SaaS solutions are the way to go. As a result, you won't have to go to the trouble of creating your own tools when ready-made options are available.


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