Software development services is a complicated process to design an application or software in order to meet a particular business or personal objective, goal or process. This process consists of various stages: Planning, Analysis, Product Design, Development & Implementation, Testing, Maintenance.
Software as a service (SaaS) is a software distribution model in which a cloud provider hosts applications and makes them available to end users over the internet. In this model, an independent software vendor (ISV) may contract a third-party cloud provider to host the application. Or, with larger companies, such as Microsoft, the cloud provider might also be the software vendor.