What is SaaS?

SaaS means Software-as-a-Service.
SaaS is the applications layer of Cloud Computing delivering software capabilities to organisations of all types through the users web browser.

The SaaS Vendors host a single, centralised, multi-tenanted version of the applications software. Each customer accesses their own instance and the SaaS vendor ensures the users data is held in a secure environment. The users pay a fee for the SaaS software either by periodic subscription, per transaction charge (Pay as you Grow) or based on usage time.

SaaS applications have been developed for email, team collaboration,HR and Payroll and accounting and the SaaS model is now being used to provide high performance, highly resilient and secure applications across a range of company sizes and industries.