SaaS – Software as a Service

Before moving towards SaaS, lets distinguish traditional IT method : :

With a traditional approach to IT, the technology capabilities are housed on-site. The site, or company, purchases the hardware and software that are necessary to meet the technology needs of the business.
Hired IT personnel take care of making any technology changes or upgrades, and perform any troubleshooting that needs to happen if something goes wrong.

The core difference between traditional IT and the cloud is location. Cloud services are hosted off-site. Employees at a company access the programs that they need via an internet connection. This core difference creates many additional differences between the two approaches.

In this article you will learn what SaaS model is ! 
& how it eliminates common problems in Traditional IT Approach .


What is SaaS ?

Software as a service (SaaS)
is a software distribution model in which a third-party provider hosts applications and makes them available to customers over the Internet.
SaaS is one of three main categories of cloud computing, alongside infrastructure as a service (IaaS) and platform as a service (PaaS).

SaaS removes the need for organizations to install and run applications on their own computers.
This eliminates the expense of hardware acquisition, provisioning and maintenance,
as well as software licensing, installation and support.

Other benefits of the SaaS model include:
Flexible payments:
Rather than purchasing software to install, or additional hardware to support it,
customers subscribe to a SaaS offering. Generally, they pay for this service on a monthly basis using a pay-as-you-go model.
Users can also terminate SaaS offerings at any time to stop those recurring costs.

Scalable usage:
Cloud services like SaaS offer high scalability, which gives customers the option to
access more, or fewer, services or features on-demand.

Automatic updates:
Rather than purchasing new software, customers can rely on a SaaS provider
to automatically perform updates and patch management.
This further reduces the burden on in-house IT staff.

Accessibility and persistence:
Since SaaS applications are delivered over the Internet,
users can access them from any Internet-enabled device and location.

SaaS is closely related to the ASP (application service provider) and on demand computing software delivery models.
The hosted application management model of SaaS is similar to ASP: the provider hosts the customer’s software and delivers it to approved end users over the internet.

Organizations can integrate SaaS applications with other software using application programming interfaces (APIs).
For example, a business can write its own software tools and use the SaaS provider’s APIs to integrate those tools with the SaaS offering.

There are SaaS applications for fundamental business technologies, such as email, sales management, customer relationship management (CRM), financial management, human resource management, billing and collaboration.

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