SaaS vs. PaaS vs. IaaS: What’s the Difference?

My Post - 2019-04-08T115944.901.jpgThanks to the Internet, companies are able to not only distribute developments remotely, but also deploy them online.

Users can now access a wide variety of applications on-demand over the Internet. In cloud computing, these are known as “as-a-service” programs and can be identified with an acronym ending in “aaS”. These labels indicate the cloud application deployment model that the company uses to distribute their service over the Internet.

No doubt anybody looking into adopting a cloud-based application has seen an “as-a-service” label before. There are several labels geared for specific industries, such as disaster-recovery-as-a-service (DRaaS) and integration-platform-as-a-service (iPaaS). However, for general cloud-based applications, you’ll typically see one of three deployment models: software-as-a-service (SaaS), platform-as-a-service (PaaS), and infrastructure as a service (IaaS). What do these deployment models mean, and what do they provide for the user? Below, we outline the differences between SaaS, PaaS, and IaaS, and what each deployment model means for both the service provider and the customer.

Software-as-a-service (SaaS)

Software-as-a-service is the most common cloud deployment model. SaaS refers to applications delivered over the Internet that a third party manages. In other words, the user doesn’t have to worry about hosting, downloading, or updating any software. SaaS applications are typically accessed and ran via a Web browser, eliminating the need to download software onto a user’s machines. In addition, SaaS providers manage everything, from the runtime to the networking.

There are plenty of benefits to using SaaS applications. For example, IT teams don’t need to factor in installation and hosting expenses, making SaaS more cost efficient. The lack of management responsibilities means IT teams have more time to work on projects. However, this is also a double-edged sword. Since app providers manage the entirety of the app’s systems, it’s up to them to fix it – meaning IT teams may experience downtime that they can’t do anything about. – Read more

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