Content Security Policy
3,691,747 websites

Content Security Policy is free to use

http://www.w3.org/TR/CSP/

Content Security Policy is best used as defense-in-depth, to reduce the harm caused by content injection attacks.

VS

Meta Keywords
7,523,563 websites

Meta Keywords is free to use

http://www.wordstream.com/meta-keyword

Meta Keywords are a specific type of meta tag that appear in the HTML code of a Web page and help tell search engines what the topic of the page is.

Market Share by Top Websites

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

2 In terms of market share, Content Security Policy is clearly lagging behind, losing to Meta Keywords in all segments.

Websites Categories

1 Meta Keywords has better usage coverage in more websites categories. Including Computers Electronics & Technology, Arts & Entertainment, Science & Education, Games and 20 other categories.

2 Content Security Policy hasn't got a lead over Meta Keywords in any websites category.

Geography

1 Meta Keywords is leading in most countries, including China, Japan, Russia, Germany and 155 other countries.

2 Content Security Policy is leading in United States, Canada, Australia, Philippines and 3 other countries.