Software as a Service - SaaS
Software as a service (SaaS) is software that is supplied to customers over the Internet using a pay-as-you-go model (on demand).
The vendor takes care of the hardware, security and maintainance.
Instead of purchasing a license, a user pays a monthly fee ‒ similar to a rental agreement.
Software as a service solutions are highly scaleable. Providers are able to quickly respond to customer requirements because the software is hosted centrally.