Canonical Tag
trend
13,079,994 websites

Canonical Tag is free to use

http://en.wikipedia.org/wiki/Canonical_link_element

A canonical link element is an HTML element that helps webmasters prevent duplicate content issues by specifying the "canonical", or "preferred".

VS

Content Security Policy
trend
3,693,364 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.

Market Share by Top Websites

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

2 Despite its recent growth, Content Security Policy is still behind Canonical Tag in all market share segments.

Websites Categories

1 Canonical Tag has better usage coverage in more websites categories. Including Computers Electronics & Technology, Arts & Entertainment, Science & Education, Food & Drink and 20 other categories.

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

Geography

1 Canonical Tag is leading in most countries, including United States, Japan, Germany, United Kingdom and 162 other countries.

2 Content Security Policy hasn't got a lead over Canonical Tag in any country.