What describes a "software-as-a-service" model?

The software-as-a-service (SaaS) model is characterized by applications that are hosted by a third-party vendor and accessed by users over the internet. This model eliminates the need for users to install software directly on their individual machines, as the applications are delivered via the cloud. The vendor is responsible for maintaining the infrastructure, ensuring availability, and managing updates, which allows users to focus on utilizing the software without the complexities of installation or maintenance.

Users typically subscribe to these services rather than purchasing them outright, which provides flexibility in terms of cost and scalability. Additionally, since the software is accessible from any device with an internet connection, it enhances collaboration and accessibility for users. This model contrasts sharply with traditional software installation methods where the software resides on local machines and requires users to manage updates and installations independently.

In this context, the focus on hosted applications tailored to be accessed remotely by users differentiates the SaaS model significantly from in-house developed solutions or hardware-centric services.