Infrastructure as a service (IaaS) is a standardized, highly automated offering in which computing resources owned by a service provider, complemented by storage and networking capabilities, are offered to customers on demand. (Gartner)

Software as a Service is a method of software delivery where applications are hosted remotely by a vendor or service provider and are made available to customers over a network. SaaS can provide extremely notable advantages in the business environment such as cost savings, time savings, scalability and compatibility.