IaaS vs PaaS vs SaaS  Top Cloud Service Models 2021
                     Top Cloud Service Models 
2021
Today the cloud has become one of the 
most appropriate places to store and 
manage sensitive databases and the 
COVID-19 pandemic has accelerated the 
adoption of the cloud at every level. 
The cloud not just makes a secure 
environment to monitor the data but also 
allows to access your crucial information 
from anywhere through any device. 
Flexibility, scalability, ease-of-
configuration, savings and security, this is 
all that cloud services offers.
IaaS vs PaaS vs IaaS
SaaS: 3 Core Service Infrastructure as a Service
Models
PaaS
Platform as a 
In this write up, we will delve into three 
different cloud service models IaaS, Service
PaaS, and SaaS along with their 
examples. Saas
Software as a 
Service
IaaS
(Infrastructure as a Service)
IaaS is a cloud computing solution that offers 
provisioning, managing, and computing 
service resources over the Internet, like 
servers, storage, devices, and virtualization 
devices.
 Infrastructure as a Service (IaaS) offers the 
technologies and capabilities of quality data 
centers even without any significant capital 
investment of IT infrastructure. 
IaaS Best Examples
All the resources are available and 
WHY ready to -use
No need to invest in physical devices 
and software
IAAS? Pay as you use: Pay only for the 
resources in use
No need to worry about physical data 
centre's security
Access the information and resources 
from anywhere
MAIN BENEFITS OF 
USING IAAS
Full Control Extend Automate Instant Fixes
S
Complete control Re
tsoourracegs ecan be Business
Full access to  Less downtime, 
and manage their purchased as per business automation instant business demand 
entire maintenance, and 
without investing a lot and scalability
infrastructure recovery from 
outages
Challenges of IaaS
Features Downtime Compatibility
Limitation
 IaaS features vary Service performance Complex 
according to the issues might affect in management and 
service provider public cloud interoperability 
between 
environments
PaaS
(Platform as a Service)
PaaS is another popular cloud service model 
that offers a ready-to-use development 
environment for developers to stay focused on 
writing and implementing advanced code to 
create highly customized applications. 
This platform is delivered via the web and 
allows developers to create highly scalable and 
high-quality applications without worrying about 
storage space, OS, software updates, and more. 
Basically, it provides simple frameworks for 
developers to code, develop, manage, 
distribute, and deploy applications.
PaaS Best Examples
Pay for the resources you use, no 
WHY physical IT infrastructure
Ready-to-use platform to develop, 
design, deploy applications
PAAS? Easy software development cycle with 
simple user interface
Complete control over the installed 
tools on the infrastructure
Advanced security, data protection, 
and automated data backups
MAIN BENEFITS OF 
USING PAAS
Ease of use
Seamless software development, deployment, 
testing
Code Easily
Developers can build advanced applications easily with less 
code
Maintenance
Superfast innovation and no need to spend time to maintain core 
stack
No Investment on Hardware
No need to purchase hardware or software to develop applications
Simple UI
Completely web-based interface and multi-tenant 
architecture
Challenges of PaaS
Fewer Compatibility Risky
NPoe cromntriosl sovieor nthse IIfs tsheu aepplications High risk of platform 
infrastructure, will not support some security and the user 
everything is sort of development is responsible for the 
dependent on the platform developed 
vendor’s uptime applications 
SaaS
(Software as a Service)
As the name indicates, SaaS is famous for 
delivering cloud-based applications and software 
to use over the Internet and it is also known as 
Cloud Application Services. 
In this cloud service, the application is hosted 
online and individuals can use these applications 
by purchasing a subscription plan. 
All the applications offered by the SaaS cloud 
platform can be accessed simply through a 
browser or software through any device from all 
around the world.
SaaS Best Examples
Automatic platform updates; no need 
WHY to worry about manual updation
Ready-to-use applications with the 
latest versions and free (mostly)
SAAS? Highly compatible with various devices 
and no compatibility issue
All the software/applications are 
accessible from anywhere/anytime
IT staff not needed to download, 
install, or configure applications
MAIN BENEFITS OF 
USING SAAS
Time-Saving
Saves a lot of time and money as IT team outsourcing is not 
required
Focus on Quality
Developers are free to utilize their time on valuable business 
operations
Automatic Updates
No need to worry about continuous upgrades and UX improvements
Complete scalability
Integration with other platforms or applications
Fewer Expenses
Free up-front licenses will result in reduced software usage 
expenses
Challenges of SaaS
Security Customization Lock-in
Data security is in Not many options to Interoperability and 
danger as all the customize or add vendor lock-in issue is 
sensitive information features to existing one of the main 
is saved within web web concerns of SaaS 
apps applications/software platform
IAAS VS PAAS VS 
SAAS: THE KEY 
ON- DIFFERENCES PA SAA
IaaS
PREMISES AS S
APPLICATI
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DAT
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RUNTI
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OS
MIDDLEW
ARE
IAAS VS PAAS VS 
SAAS: THE KEY 
ON- DIFFERENCES PA SAA
IaaS
PREMISES AS S
SERVER
VIRTUALIZA
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NETWOR
KING
STORA
GE
YOU SERVICE 
MANAGE PROVIDER 
MANAGE
Storage as a Service (STaaS)
There’s So Containers as a Service (CaaS)
Much More 
Beyond IaaS, Functions as a Service (FaaS)
PaaS, and SaaS
Hardware as a Service (HaaS)
Database as a Service (DBaaS)
IaaS vs PaaS vs SaaS: 
Which One Is The Best 
For My Business?
HostingSeekers
Now, you have all the details of each cloud service 
category and you can select the most appropriate 
services as per the capacity and requirements of your 
business. 
These services are a crucial component of cloud 
computing and their usage is increasing exponentially 
in our day-to-day lives. That’s why you should start 
using one (if not already) to automate most of your 
business processes. 
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