Software as a Service (SaaS), a category of cloud computing, is a type of service built and offered over the internet by third party companies. This type of software allows users to install and run the software without downloading it onto their own computer or server. The third party provider completes all maintenance, updates, and support. Users typically pay a monthly fee, allowing for more flexibility over budgeting and switching to other similar services. Though very advantageous, a user has no control over disruptions in service, updates to the software, and unwanted changes to the software.
SaaS includes email, customer relationship management, financial management, billing, and healthcare software.