CAPTCHA Usage

Statistics for websites using CAPTCHA technologies

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

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Name 10k 100k Million Entire Web
reCAPTCHA 1,073 6,907 41,355 1,104,155
Are You a Human 71 524 5,626 115
SI CAPTCHA 12 196 1,918 70,106
WP reCAPTCHA 6 52 356 12,431
Sweet Captcha 2 8 65 3,173
NuCaptcha 0 0 0 0
KeyCAPTCHA 0 0 11 75
Keypic 0 0 0 1
Picatcha 0 1 5 30
Hashcash 0 1 4 149

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