SaaS
Software as a service (SaaS) is a model in which a provider hosts and runs software that customers use over the internet.
Software as a service (SaaS) is a delivery model in which a provider hosts and operates software that customers access over the internet, typically through a web browser. It is usually paid for by subscription or usage, in contrast to software that customers install and maintain on their own servers or computers. Among cloud service models, SaaS delivers finished applications, whereas IaaS provides infrastructure and PaaS provides development and runtime environments.
Salesforce, founded in 1999, became a prominent early example by offering customer relationship management (CRM) software over the web, and the model later spread to collaboration, accounting, human resources and other fields.
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That distinction matters for teams paying for several software-as-a-service (SaaS) products—subscription tools delivered online—while using only a small part of…
Neither figure is an all-in cost to operate a SaaS product.