Metal Captcha

A captcha form for metal fans

12 Alternatives To Metal Captcha

Akismet

Akismet is a spam fighting service that protects millions of WordPress sites from comment and contact form spam.
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Confident Captcha

Confident Technologies provides free CAPTCHA security software called Confident CAPTCHA, a picture…

Elimi

Truth or dare dating
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FeedCaptcha

FeedCaptcha is a new captcha system, easy to integrate and with meaning for your product.
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Hotmark

Create honeypots & protect your e-mail lists
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Humans Not Invited

CAPTCHA that filters out humans and only lets programs pass

Just For Fun

Showcasing creative side projects
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MTcaptcha

Enterprise Captcha solutions

NoMoreCaptchas

What Does NoMoreCaptchas Do?
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Spamty

Spamty is a web service to encrypt an email address and share it on the internet.

Virusdie

All-in-One cloud-based, simple, powerful and gorgeous website security tools built for everyone.
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reCAPTCHA

reCAPTCHA is a free security service that protects your websites from spam and abuse.