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Software as a service (SaaS / s æ s / [1]) is a cloud computing service model where the provider offers use of application software to a client and manages all needed physical and software resources. [2] SaaS is usually accessed via a web application.
Comparison of on-premise, IaaS, PaaS, and SaaS Cloud computing service models arranged as layers in a stack. The National Institute of Standards and Technology recognized three cloud service models in 2011: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).
Platform as a service (PaaS) or application platform as a service (aPaaS) or platform-based service is a cloud computing service model where users provision, instantiate, run and manage a modular bundle of a computing platform and applications, without the complexity of building and maintaining the infrastructure associated with developing and launching application(s), and to allow developers ...
SaaS (Software as a Service) Initial release date License(s) Written in As a service Local installations fluid Operations eCloudManager: 2009-03-01 Proprietary: Java, Groovy No Yes AppScale [33] 2009-03-07 Apache License: Python, Ruby, Go Yes Yes Cloud Foundry: 2011-04-12 Apache License: Ruby, C, Java, Go Yes Yes Cloud.com / CloudStack [34 ...
According to The NIST Definition of Cloud Computing, [3] there are three service models associated with cloud computing: infrastructure as a service (IaaS), platform as a service (PaaS), and software as a service (SaaS). The concept of ITaaS as an operating model is not limited to or dependent on cloud computing.
IaaS services are typically billed as a utility: cost reflects the amount of resources allocated or consumed. Typically, IaaS involves the use of a cloud orchestration technology such as OpenStack, Apache CloudStack, or OpenNebula. It manages the creation of a virtual machine (VM) and decides on the hypervisor (i.e. physical host) in order to ...
In this business model, data provides value as a support mechanism or a tool for creating other value propositions, that's why the revenue stream is typically quite a bit lower. [19] In turn, Data as a Service is one of 3 categories of big data business models based on their value propositions and customers: Answers as a Service;
SaaS typically involves a monthly or annual fee. [6] [7] Software as a service provides the equivalent of installed applications in the traditional (non-cloud computing) delivery of applications. [8] Software as a service has four common approaches: [8] [9] single instance; multi-instance; multi-tenant; flex tenancy