Facebook Page Administration
500,743 websites

Facebook Page Administration is free to use

http://developers.facebook.com/docs/opengraph

Identifies administrators for a page which will be able publish data to your wall if you like any content within this page.

VS

Pinterest
292,411 websites

Pinterest is free to use

http://pinterest.com/

Pinterest is a social networking site with a visually-pleasing virtual pinboard interface. Users collect photos and link to products they love, creating their own pinboards and following the pinboards of other people whom they find interest...

Market Share by Top Websites

1 Facebook Page Administration is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, Pinterest is clearly lagging behind, losing to Facebook Page Administration in all segments.

Websites Categories

1 Facebook Page Administration has better usage coverage in more websites categories. Including Computers Electronics & Technology, Arts & Entertainment, Science & Education, News & Media and 16 other categories.

2 Pinterest is leading in Food & Drink, Lifestyle, Home & Garden and Hobbies & Leisure.

Geography

1 Facebook Page Administration is leading in most countries, including United States, Japan, France, United Kingdom and 158 other countries.

2 Pinterest is leading in Argentina, Republic Of The Congo and Haiti.