SaaS – Software-as-a-Service is generally charged depending upon the number of users and charges are recurring monthly or yearly. Companies have the choices to add or remove users at any time without additional costs. Some of the most well known SaaS solutions are Microsoft office365, SalesForce, Google Apps. It is a responsibility of SaaS provides to manage Server, Network, and Security related threat intern it supports organization to reduce the cost of software ownership by removing the need for technical staff to manage install, manage, and upgrade software, as well as reduce the cost of licensing software.
A cloud service, typically providing a platform on which software can be developed and deployed in short it provides a platform to the software developer. PaaS decreases the amount of coding required, automates company policy and aids the migration of apps to hybrid clouds.