Alternatives to Securimage for all platforms with any license


    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

    reCAPTCHA icon
  • visualCaptcha

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

    Free Open Source Self-Hosted GitHub

    visualCaptcha icon
    • 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

    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

    UniqPin icon
  • Sblam!

    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

    Sblam! icon
  • FunCaptcha

    FunCaptcha is another Captcha software, but it has something more to it. No more "Write this into the box" captchas! These are Fun captchas!.

    Free Web

    No features added Add a feature

    FunCaptcha icon
  • Negative Captcha

    A plugin to make the process of creating a negative captcha in Rails much less painful.

    Free Open Source Self-Hosted

    No features added Add a feature

    Negative Captcha icon


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