What kind of cloud model is best suited to the situation that you are the only IT employee for a small startup and you need to provide email addresses to all employees at the startup as soon as possible and with minimal effort?

Software as a Service (SaaS) is a cloud paradigm that allows consumers to access a certain function without having to worry about infrastructure, networking, or server configuration. The majority of web-based services are classified as SaaS. Google Gmail, Yahoo Mail, Hotmail.com, and Outlook.com are examples of email SaaS providers.