Coinhive Captcha
236 websites

Coinhive Captcha is free to use

https://coinhive.com/documentation/captcha

Coinhive is proof of work captcha widget, alternative to Google's reCaptcha. This prevents spam at an inconvenience that is comparable to a classic captcha and provides the added benefit of earning money from user's' form submission.

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KeyCAPTCHA
678 websites

KeyCAPTCHA is free to use

https://www.keycaptcha.com

CAPTCHA for WordPress, Joomla, Drupal, vBulletin, SMF, IPB, phpBB and other PHP websites.

Market Share by Top Websites

1 KeyCAPTCHA is leading in Top 1M Sites and The Entire Web.

2 Coinhive Captcha is leading in Top 100K Sites.

Websites Categories

1 KeyCAPTCHA has better usage coverage in more websites categories. Including Vehicles, Arts & Entertainment, Games, Science & Education and 17 other categories.

2 Coinhive Captcha is leading in Computers Electronics & Technology, Gambling and Jobs & Career.

Geography

1 KeyCAPTCHA is leading in most countries, including Russia, United States, Ukraine, Germany and 45 other countries.

2 Coinhive Captcha is leading in India, Brazil, Indonesia, Vietnam and 22 other countries.