Software as a Service (SaaS) is a cloud computing model in which a third-party provider hosts applications and makes them available to customers over the internet. SaaS is a type of cloud computing that delivers applications over the internet. These applications are managed by a third-party provider and made available to customers on demand. Customers access the applications through a web browser or mobile device. SaaS applications are typically subscription-based and can be used on a pay-as-you-go basis.