SaaS (Software-as-a-Service) is an IT solution with following properties:
- You only need to register to the service to start using it. You don't have to install anything.
- You pay for the service either periodical (monthly) fees or you pay for usage. You don't pay one time license fees and maintenance.
- Service is available over internet.
- Software is developed for this kind of usage. It is not adjusted from a "good old" enterprise solution.
Due to these properties it is simple to start using SaaS solutions and you can start using them fast. No installation, no investment decision process, no price-negotiations are needed.