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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LightBox
1,094,240 websites

LightBox is free to use

https://github.com/lokesh/lightbox2/

Lightbox is small javascript library used to overlay images on top of the current page. It's a snap to setup and works on all modern browsers.

Market Share by Top Websites

1 LightBox is leading in Top 1M Sites and The Entire Web.

2 Errorception is leading in Top 10K Sites and Top 100K Sites.

Websites Categories

1 LightBox has better usage coverage in more websites categories. Including Science & Education, Computers Electronics & Technology, Games, Health and 15 other categories.

2 Errorception is leading in Arts & Entertainment, Adult, News & Media, Hobbies & Leisure and one other category.

Geography

1 LightBox is leading in most countries, including United States, Germany, Japan, Russia and 161 other countries.

2 Errorception is leading in Taiwan.