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.
Polyfill.io is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.
In terms of market share, MooTools is clearly lagging behind, losing to Polyfill.io in all segments.
Polyfill.io has better usage coverage in more websites categories. Including Computers Electronics & Technology, Lifestyle, Food & Drink, Law & Government and 18 other categories.
MooTools is leading in Science & Education and Heavy Industry & Engineering.
Polyfill.io is leading in most countries, including United States, United Kingdom, Canada, Japan and 143 other countries.
MooTools is leading in Russia, Poland, Greece, Ukraine and 15 other countries.