Phobas Inc. offers an online service which stores notes made by customers on the cloud. When a customer enters notes on one device, it gets updated in all the devices he/she owns. Which of the following cloud-based offerings is being provided to the customers?

Software as a service (SaaS)

Explanation:

Software as a service (SaaS) is a software licensing and release model in which the subscription basis of software licensing is done on a subscription basis and is centrally hosted. It is occasionally referred to as "on-demand software", and was in earlier times referred to as "software plus services" by Microsoft.

For instance, a company can write or build its own software packages and use the SaaS provider's APIs to incorporate those tools with the SaaS offering.