As a service

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*aaS is an acronym for as a service (e.g., X as a service), and refers to something being presented to a customer, either internal or external, as a service.[1] As a Service, or XaaS (Anything as a Service) offerings provide endpoints for customers/consumers to interface with which are usually API driven, but can commonly be controlled via a web console in a user's web browser.

Internally these often complex systems generally possess a high degree of internal automation which generally provide varying levels of fault tolerance and resiliency, the ability to scale up/down in or out to meet capacity and performance requirements of the workloads submitted to the service by its users/consumers, and are usually intended to operate their day to day functions without the need for human intervention. IaaS (Infrastructure as a service) features most commonly included in this automation package are compute, storage, network, telemetry, and logging/accountability features, but most IaaS components owe some portion of their workload to these services. The current cloud computing ecosystem contains multiple cloud providers, each with their own menu of these services for their customers to consume on-demand or in some cases even with pre-scoped capacity agreements.[2]

Because (X)aaS services are generally based on open source projects with little to no licensing costs,[citation needed] ideally require little to no human intervention to perform their tasks/roles,[citation needed]could be scaled out on demand to the full physical resource capacity of an entire datacenter region,[citation needed] are maintained and supported internally by the cloud provider,[citation needed] and use resources that are expendable for reuse by other IaaS tasks and services,[citation needed] XaaS services represent a large cost savings[citation needed] over traditional vendor-provided infrastructure and server based equivalencies, which often include vendor-specific lock-in features and imposed product feature set limitations which focus more around supporting that vendor's product portfolio and feature roadmap than similar open source projects.[citation needed]


Service Abbr.
Banking as a service BaaS
Blockchain as a service
Content as a service CaaS
Data as a service DaaS
Desktop as a service
Database as a service DBaaS
Electric vehicle as a service [3][4] EVaaS
Function as a service FaaS
Games as a service GaaS
Identity as a service IDaaS
Infrastructure as a service IaaS
Integration platform as a service iPaaS
IT as a service ITaaS
Knowledge as a service KaaS
Logging as a service LaaS
Lighting as a service
Mobility as a service MaaS
Monitoring as a service
Mobile backend as a service MBaaS
Network as a service NaaS
Payments as a service PaaS
Platform as a service
Quality assurance as a service QAaaS [5]
Recovery as a service RaaS
Robot as a service
Security as a service SaaS
Software as a service
Unified communications as a service UCaaS

See also[edit]


  1. ^ Robin Hastings, Making the Most of the Cloud: How to Choose and Implement the Best Services (2013), p. 3.
  2. ^ Archived at Ghostarchive and the Wayback Machine: "Cloud Architecture Fundamentals". YouTube.
  3. ^ I. A. Umoren, and M. Z. Shakir, EVaaS: a novel on-demand outage mitigation framework for electric vehicle enabled microgrids. in Proc. IEEE Globecom WS, Abu Dhabi, 2018, p. 6.
  4. ^ I. A. Umoren, S. S. A. Jaffary, M. Z. Shakir, K. Katzis and H. Ahmadi, "Blockchain-Based Energy Trading in Electric Vehicle Enabled Microgrids," in IEEE Consumer Electronics Magazine, doi: 10.1109/MCE.2020.2988904.
  5. ^ Phil (February 22, 2017). "QA Services vs QA as a Service: Is There a Difference?". Test IO.