Alternative products to Metal Captcha

Metal Captcha

A captcha form for metal fans

4 alternative and related products to Metal Captcha

Humans Not Invited

CAPTCHA that filters out humans and only lets programs pass

Humans Not Invited is a CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) that filters out humans and only lets programs pass. This is the first iteration of a system that we’re working on.

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Image: Humans Not Invited Chances are that at some point when searching Google, purchasing concert tickets, or signing up for a forum, you've had to click a few boxes to confirm your humanity. But while these CAPTCHA tests are usually meant to keep robots out, one website is welcoming them in.
8 Alternatives to Humans Not Invited
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