Software as a Service (SaaS) Model
The annual license is also known as the subscription or software as a service (SaaS) fees which is billed annually. Annual per-user-per-year fees is all-inclusive of yearly license, technical support, software maintenance throughout the year. The subscription fees will decrease with more users, usually on a tiered basis.
This is the original enterprise software licensing model. In the perpetual model of licensing, the client makes an upfront, one-time purchase of the Dfogg and then client owns the software.