NuCaptcha
470 websites

NuCaptcha is free to use

http://www.nucaptcha.com/

NuCaptcha is the next generation of Captcha security specifically designed to allow authenticated humans to pass quickly and easily while adjusting to a higher level of captcha security when a risk is detected.

VS

Sweet Captcha
70 websites

Sweet Captcha is free to use

http://sweetcaptcha.com

sweetCaptcha is a human friendly illustrated captcha focused on enhancing the user experience on your website.

Market Share by Top Websites

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

2 Sweet Captcha is leading in Top 100K Sites.

Websites Categories

1 NuCaptcha has better usage coverage in more websites categories. Including Science & Education, Community & Society, Computers Electronics & Technology, News & Media and 20 other categories.

2 Sweet Captcha hasn't got a lead over NuCaptcha in any websites category.

Geography

1 NuCaptcha is leading in most countries, including United States, France, Spain, Italy and 52 other countries.

2 Sweet Captcha is leading in Albania, Denmark, Greece, Portugal and one other country.