SaaS is a method of software delivery that allows data to be accessed from any device with an Internet connection and web browser. In this web-based model, software vendors host and maintain the servers, databases and code that constitute an application. This is a significant departure from the on-premise software delivery model. First, companies don’t have to invest in extensive hardware to host the software, and this in turn, allows buyers to outsource most of the IT responsibilities typically required to troubleshoot and maintain the software. The SaaS vendor takes care of it all.