When comparing C3.js vs ZingChart, the Slant community recommends C3.js for most people. In the question“What are the best JavaScript charting libraries? ” C3.js is ranked 6th while ZingChart is ranked 13th.
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Pros
Pro Declarative interface
Pro Legend out of the box
Pro Easy rotation (swap X and Y), and inverting
Pro Easy to configure and supports all basic charts
With legends and tooltips, gridlines, axis and tick label customization, etc.
Pro Good set of examples
Pro Unified data model which allows easily switch between chart types
Pro Tons of styling options
You can get extremely granular with the styling (which is very CSS-like). You can customize pretty much any aspect of a chart, so they can match your application or website perfectly.
Pro Robust API
The advantage of using a JavaScript charting library is that you can make interactive charts. The API here lets you make the most of this advantage.
Pro Easy to try
ZingChart hosts the full version of the library for evaluation on their CDN for you to try in just a matter of minutes.
Pro Angular wrapper
Pro Free branded version
There is a free version available, however it's branded. Licenses start at $249.
Pro jQuery wrapper
ZingChart has a well-built and excellently documented jQuery wrapper, making it easier to integrate ZingChart into your jQuery code.
Pro Handles large data sets without bogging down
Cons
Con Requires D3 which is not lightweight at all
Con Not open source
Con The free version inserts a watermark on all charts
Either their watermark is on all the charts or you have to pay expensive license fees.