The framework makes great use of JS components as well. ... The main difference between the two frameworks is that Bootstrap grants you significantly more freedom and control while Materialize is more opinionated about how your elements should look and behave.Materialize is a Responsive CSS Framework based on Google's Material Design Language.Materialize is an open source responsive front-end framework that offers slick material design out-of-the-box. This tool is based on Google's Material Design Language. It is primarily a UX framework that dictates how elements will appear and behave on the page.