Errorception
409,111 websites

Errorception offers both free and paid options

http://errorception.com

Errorception is a error reporting service for client-side in-browser JavaScript errors. Client-side JavaScript errors occur in the end-users' browsers. It is very hard to find out about them, since logs of such errors are lost. Errorcept...

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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.

Market Share by Top Websites

1 Errorception 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 Errorception in all segments.

Websites Categories

1 Errorception has better usage coverage in more websites categories. Including Arts & Entertainment, Adult, Games, News & Media and 17 other categories.

2 MooTools is leading in Law & Government, Heavy Industry & Engineering and Business & Consumer Services.

Geography

1 MooTools is leading in most countries, including Russia, Germany, Italy, Poland and 104 other countries.

2 Errorception is leading in United States, Taiwan, France, Canada and 50 other countries.