This document discusses the opportunities and potential threats of transitioning a software company to a Software as a Service (SaaS) model. It provides examples of how a HR SaaS company called Metrilio was able to benefit from the transition, such as reducing implementation times from 50 days to 5 days, delivering new functionalities in days instead of months, and dividing setup costs and support/maintenance costs by ten. The document also outlines the transition from custom desktop/web solutions to a multi-tenant SaaS solution, highlighting improved scalability, automated testing, and recurring revenue streams that come with the SaaS model.