What is Cloud Computing? IaaS vs PaaS vs SaaS Explain with Examples

Ever wondered where your photos, Netflix shows, or WhatsApp backups go when they’re not on your phone? They don’t disappear, they are stored on the cloud. Cloud computing works in the background and manages all this data so everything runs smoothly.  You can access it anytime without even thinking about it.

What Is Cloud Computing?

Cloud computing is a technology that provides computing services like storage, servers, databases, software, and networking over the internet instead of using local devices. It allows users to access and manage data anytime and anywhere with an internet connection  without needing to install heavy software or maintain physical hardware. This makes it flexible, scalable, and cost-effective for individuals and businesses.

Cloud computing is mainly divided into three service models: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). These models make cloud computing simple, efficient, and widely used in today’s digital world.

Let’s understand all these service models with example –

What Is IaaS?

Infrastructure as a Service (IaaS) is a cloud computing model where businesses rent basic IT resources like virtual servers, storage, and networking from a cloud provider instead of buying physical hardware. This means companies don’t need to invest in expensive machines or maintain data centers. They can simply use resources over the internet as needed.

Organizations get high flexibility and control with IaaS. They can choose how to organise and manage their systems according to their requirements. However, they are still responsible for managing things like operating systems, applications, security updates, and data.

Businesses also use IaaS to scale their systems easily. This helps them stay flexible, efficient, and ready for future growth or changes in work.

Let’s understand it in simple way –

IaaS is like renting a car. The provider gives you the vehicle, but you control how you use it. You drive it, manage fuel, and take care of maintenance. Similarly, in IaaS, the provider offers servers and infrastructure. You handle setup, applications, and system management based on your needs.

Examples of IaaS: Amazon Web Services (AWS), Google Compute Engine (GCE), IBM Cloud, Microsoft Azure.

Also Read: Cloud Computing Roadmap 2026: A Student’s Guide to Becoming a Job-Ready Cloud Engineer

What Is PaaS?

Platform as a Service (PaaS) is a cloud computing model where developers use a ready-made platform. Developers can build, run, and manage applications without worrying about infrastructure like servers, storage, or networking. This means businesses don’t need to handle hardware or system setup. They can directly focus on coding and application development.

Organizations get high efficiency with PaaS. The cloud provider manages the infrastructure, operating systems, and runtime environment. Developers only need to handle application code and data. This reduces complexity and saves time. However, users still manage their applications and ensure proper functionality.

Businesses use PaaS to develop and deploy applications faster. It supports quick testing, updates, and scaling based on demand. This helps companies stay productive, innovative, and competitive in the market.

Let’s understand it in a simple way –

PaaS is like renting a fully furnished and equipped kitchen. The provider gives you all tools, equipment, and setup. You just focus on cooking. Similarly, in PaaS, the provider manages the platform, and you focus on building applications.

Examples of PaaS: Google App Engine, Microsoft Azure App Services, Heroku, AWS Elastic Beanstalk

What Is SaaS?

Software as a Service (SaaS) is a cloud computing model where users access software applications over the internet instead of installing them on their computers. This means businesses and individuals don’t need to download, manage, or maintain software on their devices. They can simply use applications through a web browser.

Organizations get ease of use and convenience with SaaS. The cloud provider manages everything, including servers, applications, updates, and security. Users only need to log in and use the software. They don’t have to worry about technical setup or maintenance.

Businesses use SaaS to save time and cost. It allows teams to access software from anywhere and collaborate easily. SaaS can also scale based on the number of users, making it flexible for growing companies.

Let’s understand it in simple way –

SaaS is like watching movies on a streaming platform like Netflix. You don’t download or store the movie, you just access it online. Similarly, in SaaS, you use software over the internet without installing it.

Example of SaaS: Customer Relationship ,Management (CRM) systems, Email Services, Office Productivity Tools.

IaaS vs PaaS vs SaaS: Comparison Table

IaaS, PaaS, and SaaS are three cloud service models. These models differ in control, responsibility and other features.

Feature	IaaS	PaaS	SaaS
Full Form	Infrastructure as a Service	Platform as a Service	Software as a Service
What You Get	Virtual servers, storage, networking	Platform to build and deploy apps	Ready-to-use software
What You Manage	Operating System, middleware, apps, data, security	Apps and data only	Nothing — just use it
Provider Manages	Hardware, virtualization, networking	OS, middleware, runtime	Everything (hardware, platform, software)
Control Level	High	Medium	Low
Technical Skill	High (IT admin)	Medium (developer)	Low (any user)
User Responsibility	Setup, configure, secure, update	Write and deploy code	Just log in and use
Best For	Full infrastructure control	Developers building apps	End users needing software
Scaling	Manual or auto controlled by user	Automatic by provider	Automatic
Payment Model	Pay per hour or GB usage	Pay per use or per user	Subscription (per user/month)
Examples	AWS, Google Compute Engine, Microsoft Azure	Google App Engine, Azure App Services, Heroku	CRM systems, Email services, Office tools

When Should Use IaaS, PaaS And SaaS

We use IaaS, PaaS, and SaaS to avoid buying and managing physical hardware or software. We should use these models under following circumstances:

a. When the requirement is for a short period (for example, a few months)

b. When you don’t want to spend a large amount of money all at once (pay-as-you-go instead of upfront investment)

c. When it becomes difficult to maintain software or infrastructure yourself due to shortage of skilled manpower. When you use it as a service, the maintenance is handled by the service provider

d. When you want to standardize your way of working to match what is generally accepted in the market

TISA-TECH Jaipur: Best Place To Learn IaaS, PaaS And SaaS

TISA-TECH is the best training institute in Jaipur to learn IaaS, PaaS AND SaaS. It provides an 8-month Cloud Computing program. It covers AWS, Docker, and Kubernetes with hands-on labs and real-world projects. It also includes practical learning and expert mentorship. With 100% placement assistance, TISA ensures you become job-ready. Join TISA-TECH to start your cloud career today.

FAQs Section

Conclusion

Cloud computing means using IT resources over the internet. IaaS, PaaS, and SaaS are the three main ways to do it. To learn these skills, TISA-TECH Jaipur offers practical training that helps you build a strong career in cloud computing.