Cloud application services, or , represent the largest cloud market and are still growing quickly. SaaS uses the web to deliver applications that are managed by a third-party vendor and whose interface is accessed on the clients’ side. Most SaaS applications can be run directly from a web browser without any downloads or installations required, although some require small plugins.
Because of the web delivery model, SaaS eliminates the need to install and run applications on individual computers. , because everything can be managed by vendors: applications, runtime, data, middleware, OSes, virtualization, servers, storage and networking.