How to choose from SaaS, IaaS and PaaS to know which one suits best for your organization? Here is a guide to help you clear your doubts on which one is right for your CPA firm.

1. SaaS vs IaaS vs PaaS -
Which Cloud Is Right
For Your CPA Firm?

2. In earlier times, companies had doubts
regarding the adoption of public cloud
services. But due to its numerous
advantages, it is being used by many
companies now.
The cloud is a broad concept that
includes different models, and almost
every company uses at least one or the
other cloud service for their operations.

3. The cloud services include SaaS
(Software as a Service), IaaS
(Infrastructure as a Service), and
PaaS (Platform as a Service).
For accountants who use cloud
services for their business, it is
necessary to know the difference.

4. Software as a service (SaaS) is expected to grow more in
the coming 2021 year and will remain the largest market
segment.
The second-largest market segment is infrastructure as a
service (IaaS), which is expected to reach $50 billion in
2020 and is forecasted to grow 24% year over year.
The third-largest market segment is Platform as a Service
(PaaS), which is expected to reach $48.3 billion in 2021 .
01
03
02
According to Gartner

5. Understanding SaaS, PaaS,
and IaaS

6. Software as a service (SaaS) is the
mostly used cloud service. The SaaS
provider offers the cloud-based
applications which are accessible
through the internet. Clients do not
have to install or configure anything.
Examples include Xero, Dropbox,
and Salesforce.

7. Infrastructure as a Service (IaaS)
provides virtualized computing
resources such as virtualization,
storage, or networking. Examples
include Amazon Web Services
(AWS), Microsoft Azure, and
Rackspace.

8. Platform as a Service (PaaS) is a
cloud computing model that
provides software tools and
hardware to users over the Internet.
Examples include Google App
Engine and Windows Azure.

9. When to use SaaS
If your business needs ready-
made software.
Applications that need web
and mobile access.
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03
02
You can use SaaS if your
company needs short term
projects that require
collaboration.

10. When to use PaaS
Building virtual data centres.
Creating customizable
applications.
01
03
02 Multiple developers work on
a single project.

11. When to use IaaS
If you don't have enough
budget to set up an
infrastructure.
If you are a fast-growing
company that wants to pay
only for the resources you
use.
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03
02 If the company's demands
rapidly change.

12. IaaS vs PaaS
vs SaaS –
Who Manages
What?

13. Managed By
Parameters
Data Center
Applications
Network Resources
Storage
Operating System
VendorVendorVendor
IaaS PaaS SaaS
You
Vendor
Vendor
You
You Vendor
Vendor Vendor
Vendor Vendor
Vendor Vendor

14. Best option?
SaaS PaaS IaaS
SaaS is the best option for
your accounting business
if you need access to an
out-of-the-box software
such as collaboration,
CRM or Email.
PaaS can be considered
to be a good option if
your CPA firm needs a
platform where you can
build software
products.
IaaS will be a good
option if your
company needs a
managed IT
infrastructure for
hosting or storage
needs.

15. About Us
cloud solutions for accounting industry
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17. References
SaaS vs. PaaS vs. IaaS: Which One Is the Right Choice for Businesses?
-Ace Cloud Hosting
IaaS vs. PaaS vs. SaaS: What’s the Difference?
-Sam Solutions
IaaS vs PaaS vs SaaS – Which Cloud Service Wins the Battle?
-Net Solutions