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Captcha.CC

Visit Captcha.CC

Captcha.cc's free service makes it extremely simple to place very hard captcha images in front of a form submission. These images are easy for humans to read, but very hard for computers to read. This cuts down on spam for blog comments, contact form submissions and much more. Their system allows you to paste a "code-free" javascript-driven "faux captcha" on your site, or a "javascript-free" version, that uses a lightweight validator that can be dropped in to your CGI, Perl, ASP, PHP or (any other) code. Or you can use both, allowing the convenience of an AJAX validated captcha with the security of server authentication. Their system uses a method of validation that doesn't require "callbacks" or any other cumbersome, slow methods that competitors require. Captcha.cc is the easiest system to implement, while offering a high level of security.

  • Cost: Free