## SaaS SaaS, or Software as a Service, is a cloud-based service where instead of downloading software on your desktop PC or business network to run and update, you instead access an application via the internet which often involves interaction with APIs to access various functionalities and data. Compared to alternatives like IaaS (Infrastructure as a Service) and PaaS (Platform as a Service), SaaS applications are more comprehensive and ready-to-use. SaaS can be used to outsource specific functions of your backend that would be time-consuming or difficult to build yourself. This could include things like email services, analytics, customer support tools, and more. SaaS can be used to integrate with other services. For example, you could use the Google Sheets API to store and retrieve data for your app, saving you from having to write and maintain your own storage system. Examples: 1. Google Apps: Drive, Sheets, etc. 2. ChatGPT