Negative Captcha Alternatives

    Negative Captcha is described as 'A negative captcha has the exact same purpose as your run-of-the-mill image captcha: To keep bots from submitting forms. Image ("positive") captchas do this by implementing a step which only humans can do, but bots cannot: read jumbled characters from an image'. There are more than 10 alternatives to Negative Captcha for a variety of platforms, including Online / Web-based, Self-Hosted solutions, SaaS, PHP and JavaScript. The best alternative is reCAPTCHA, which is free. Other great apps like Negative Captcha are hCaptcha (Freemium), Solve Media's CAPTCHA TYPE-IN™ (Paid), Mollom (Freemium) and visualCaptcha (Free, Open Source).

    This page was last updated Oct 21, 2020

    1. reCAPTCHA is a CAPTCHA system that enables web hosts to distinguish between human and automated access to websites.
    2. hCaptcha is designed to solve the most labor intensive problem in machine learning: labeling massive amounts of data in a timely, affordable, and reliable way.
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    3. 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 struggling with difficult puzzles, users enter a simple brand message or security phrase.
    4. 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.

      Discontinued

      "The Mollom content moderation service is no longer available … as of 2 April 2018."

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    5. visualCaptcha is a configurable captcha solution, focusing on accessibility & simplicity, whilst maintaining security. It's also localizable and free, open-source, and we encourage customizations per site.

      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: https://github.com/emotionLoop/visualCaptcha/blob/master/README.md



      • Free PersonalProprietary
      • Self-Hosted
      • JavaScript
      • PHP
      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 solution UniqPin make human identification comfortable to user especially pad and mobile user.
      • FreeOpen Source
      • Linux
      • Online
      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 set up your own server if you prefer.
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    6. GeeTest protects your websites, mobile apps and APIs from bad bot attacks with zero user friction.
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    7. Confident Technologies provides free CAPTCHA security software called Confident CAPTCHA, a picture CAPTCHA that stops spam and bots. Download our free CAPTCHA security software today.
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      • FreeProprietary
      • Self-Hosted
      • PHP
      Easy to use - Nothing stupid your visitors have to type before the form submits.
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    Showing 10 of 11 alternatives