Facebook Social Graph
271,051 websites

Facebook Social Graph is free to use

https://www.facebook.com/about/graphsearch

Now you can find more of what you're looking for on Facebook and discover fun connections between people, places and things.

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SoundCloud
131,824 websites

SoundCloud is free to use

http://soundcloud.com

SoundCloud is the world's leading social sound platform where anyone can create sounds and share them everywhere. Recording and uploading sounds to SoundCloud lets people easily share them privately with their friends or publicly to blog...

Market Share by Top Websites

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

2 In terms of market share, SoundCloud is clearly lagging behind, losing to Facebook Social Graph in all segments.

Websites Categories

1 Facebook Social Graph has better usage coverage in more websites categories. Including Science & Education, Computers Electronics & Technology, Community & Society, Food & Drink and 19 other categories.

2 SoundCloud is leading in Arts & Entertainment.

Geography

1 Facebook Social Graph is leading in most countries, including United States, United Kingdom, Canada, Taiwan and 124 other countries.

2 SoundCloud is leading in France, Germany, Netherlands, Estonia and 29 other countries.