What Does Security as a Service (SecaaS or SaaS) Mean?

Security as a service (SecaaS or SaaS) is a cloud computing model that delivers managed security services over the internet. SecaaS is based on the software as a service (SaaS) model but limited to specialized information security services.

Techopedia Explains Security as a Service (SecaaS or SaaS)

SecaaS facilitates the provisioning of managed security services from the cloud, which benefits organizations in the following ways: