Ace the EC-Council Network Defense Essentials 2026 – Shield Up and Defend with Confidence!

Software as a Service delivers software applications over the internet to subscribers on a pay-as-you-go (or subscription) basis. In this model, the provider hosts and maintains the application, handles updates and security, and you access it through a web browser or simple client without installing or managing the underlying infrastructure. This is why you typically pay for usage or a subscription rather than buying licenses for on-premises software. Examples include Microsoft 365, Google Workspace, and Salesforce. The other models differ: infrastructure as a service provides virtual machines and storage for you to manage, while platform as a service offers a development platform for building apps, and identity as a service focuses on authentication and access management rather than full software delivery.