Definition

SPI model (SaaS, PaaS, IaaS)

This definition is part of our Essential Guide: Private PaaS offerings: Benefits, challenges, best practices and more

What is SPI (SaaS, PaaS, IaaS)?

SPI is an acronym for the most common cloud computing service models, Software as a Service, Platform as a Service and Infrastructure as a Service.

Software as a Service (SaaS) is a software distribution model in which applications are hosted by a vendor or service provider and made available to customers over a network, typically the Internet. Platform as a Service (PaaS) is a paradigm for delivering operating systems and associated services over the Internet without downloads or installation. Infrastructure as a Service (IaaS) involves outsourcing the equipment used to support operations, including storage, hardware, servers and networking components.

The increasing selection of services delivered over the Internet is sometimes referred to as XaaS.

This was last updated in February 2012

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'SPI is an acronym for the most common cloud computing service models, Software as a Service, Platform as a Service and Infrastructure as a Service.' Do you know what an acronym is?
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@SeanMcGrath - She identifies the acronym quite clearly. S - Software, P - Platform, and I - Infrastructure... These are all quite clear. You simply didn't make the connection.
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