It has been open-source since 2015 meaning anyone can use it for free. Charts are generated using SVG and fallback to VML for backward compatibility all the way to IE6IE8. The demo charts demonstrate a fairly rich feature set but dont wow visually.
It is a pack of filters that.
Velocity is one of my personal favourites when it comes to bringing life to graphics. This page is powered by a knowledgeable community that helps you make an informed decision. SVGJS is the one for you. It can work with just about any API that accepts numbers as inputs such as React Threejs A-Frame and PixiJS.