Facebook Like Button
1,046,401 websites

Facebook Like Button is free to use

https://developers.facebook.com/docs/plugins/like-button/

Facebook's Like button is the quickest way for people to share content with their friends. A single click on the Like button will 'like' pieces of content on the web and share them on Facebook. You can also display a Share button next to t...

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Twitter
1,822,727 websites

Twitter is free to use

https://twitter.com

All Twitter's social tools, including buttons and timeline widgets.

Market Share by Top Websites

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

2 In terms of market share, Facebook Like Button is clearly lagging behind, losing to Twitter in all segments.

Websites Categories

1 Twitter has better usage coverage in more websites categories. Including Arts & Entertainment, Computers Electronics & Technology, Science & Education, Games and 19 other categories.

2 Facebook Like Button is leading in E-commerce & Shopping.

Geography

1 Twitter is leading in most countries, including Japan, United States, United Kingdom, France and 143 other countries.

2 Facebook Like Button is leading in Poland, Vietnam, Czech Republic, Hungary and 15 other countries.