What are some alternatives?
When comparing DevExtreme and Webix UI, you can also consider the following products
JQWidgets - Unique toolkit for HTML5 Web development
Kendo UI - Fast, light, complete: 70+ jQuery-based UI widgets in one powerful toolset
UIKit - A lightweight and modular front-end framework for developing fast and powerful web interfaces
Bootstrap - Simple and flexible HTML, CSS, and JS for popular UI components and interactions