MooTools
192,033 websites

MooTools is free to use

http://mootools.net/

MooTools is a collection of JavaScript utilities designed for the intermediate to advanced JavaScript developer. It allows you to write powerful and flexible code with its elegant, well documented, and coherent APIs.

VS

Polyfill.io
757,000 websites

Polyfill.io is free to use

https://polyfill.io/v3/

Polyfill is a service which accepts a request for a set of browser features and returns only the polyfills that are needed by the requesting browser.

Market Share by Top Websites

1 Polyfill.io is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, MooTools is clearly lagging behind, losing to Polyfill.io in all segments.

Websites Categories

1 Polyfill.io has better usage coverage in more websites categories. Including Computers Electronics & Technology, Lifestyle, Food & Drink, Law & Government and 18 other categories.

2 MooTools is leading in Science & Education and Heavy Industry & Engineering.

Geography

1 Polyfill.io is leading in most countries, including United States, United Kingdom, Canada, Japan and 145 other countries.

2 MooTools is leading in Russia, Poland, Greece, Ukraine and 12 other countries.