CAPTCHA Usage

Statistics for websites using CAPTCHA technologies

reCAPTCHA
Are You a Human
SI CAPTCHA
WP reCAPTCHA
Sweet Captcha
Hashcash
GEETEST
NuCaptcha
KeyCAPTCHA
Keypic

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Name 10k 100k Million Entire Web
reCAPTCHA 966 6,568 41,045 1,960,435
Are You a Human 123 827 2,985 103
SI CAPTCHA 8 159 1,694 115,139
WP reCAPTCHA 3 48 332 11,054
Sweet Captcha 2 8 54 2,827
NuCaptcha 0 0 0 0
KeyCAPTCHA 0 0 5 64
Keypic 0 0 0 2
Picatcha 0 0 1 24
Hashcash 0 1 3 119

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