Alternatives to Negative Captcha for all platforms with any license

  • reCAPTCHA icon


    reCAPTCHA is a free CAPTCHA service that helps to digitize books, newspapers and old time radio shows. About 200 million CAPTCHAs are solved by humans around the...

    Free Web

    No features added Add a feature
  • visualCaptcha icon


    A configurable captcha solution, focusing on accessibility & simplicity whilst maintaining security.

    Free Open Source Self-Hosted GitHub

    • Discontinued As from Dec 26, 2016: Please note visualCaptcha is no longer actively developed. It still works and should continue to, but it won't be improved by the initial team anymore. ... Source:
  • UniqPin icon


    UniqPin is a free for non-commercial use service which destiny improve ability of interfaces detect a human or a computer operate with it. Surpassing a CAPTCHA...

    Free Personal Self-Hosted JavaScript PHP

    No features added Add a feature
  • Mollom icon


    Mollom is a freemium web service to get rid of spam, unwanted content and fake users on your Drupal, Wordpress and Joomla site or blog.

  • Solve Media's CAPTCHA TYPE-IN™ icon

    Solve Media's CAPTCHA TYPE-IN™

    Solve Media's CAPTCHA TYPE-IN ads are an easy plug-in solution that saves your users time while making your site more secure and more profitable. Instead of...

    Commercial Web

    No features added Add a feature
  • Securimage

    Securimage is a script for generating complex images and CAPTCHA codes to protect forms from spam and abuse. It can be easily added into existing forms on your website...

    Free Open Source Web

    No features added Add a feature
  • PlayThru icon


    The PlayThru is the next generation of online human verification. It is designed to be more simple, more intuitive, and more fun than the current CAPTCHA options. We...

    Free Web

    No features added Add a feature
  • Sblam! icon


    Open-source implementation of server-side spam filtering of blog comments and forum posts. It's available as a free web service. It's open source, so you can...

    Free Open Source Linux Web

    No features added Add a feature
  • phpformmailer

    Easy to use - Nothing stupid your visitors have to type before the form submits.

    Free Self-Hosted PHP

    No features added Add a feature
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