Can I include Website Builder into my theme?

Visual Composer Website Builder has a Free version that can be included into a theme for free. Your theme users will have to activate the free version and proceed with the building of the page. In order to offer customized content elements within your theme, Visual Composer offers an extensive API which allows to develop custom content elements and bundle them into a theme. The custom elements will work also in the Free version so your theme users will be able to access them right away.