Polyfill.io
trend
755,258 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.

VS

TrackJS
trend
397,420 websites

TrackJS offers both free and paid options

https://trackjs.com/

JavaScript error detection app for detecting JS errors on customer visits.

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, TrackJS is clearly lagging behind, losing to Polyfill.io in all segments.

Websites Categories

1 TrackJS has better usage coverage in more websites categories. Including Computers Electronics & Technology, Lifestyle, Business & Consumer Services, Science & Education and 12 other categories.

2 Polyfill.io is leading in Food & Drink, Law & Government, Arts & Entertainment, Sports and 4 other categories.

Geography

1 Polyfill.io is leading in most countries, including United States, United Kingdom, Canada, Japan and 147 other countries.

2 TrackJS is leading in Russia, China, Taiwan, Ukraine and 9 other countries.