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reCAPTCHA

1
reCAPTCHA is a free service that helps to digitize books, newspapers and old time radio shows while preventing automatic form filling by robots.
Captcha online services comparison
Name
reCAPTCHA
Screenshot
Distinctive featuresThe service helps to digitize books or audio shows
Multi-languageYes English, German, French, Dutch... (8 languages + custom)
Visual customizationYes 4 themes + custom
Audio captchaYes
Code samplePHP, ASP, Java/JSP, Perl...
Wordpress pluginYes
Compatible SSLYes
Notable web site using it
Pricing
Free planYes
Pricing
Additional
Websiterecaptcha.net
Twitter
Webmaster
English
Public
Public
Aug. 7th 2012 11:09:28 PM
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