ActsAsTextcaptcha provides spam protection for Rails models with text-based logic question captchas. Questions are fetched from Rob Tuley's textcaptcha.com They can be solved easily by humans but are tough for robots to crack.

Despamilator is a plugin based spam detector designed for use on your web forms borne out of two annoyances: Spam being submitted in my web forms and CAPTCHAS being intrusive. Despamilator will apply some commonly used heuristics from the world of anti-spam to help you decide whether your users a...

RubyGem package for visualCaptcha's backend service

AntiCaptcha api ruby wrapper

Arithmetic Captcha

Drop in feedback engine with customizable fields, and captcha available

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Rails extension for Cloudflare's Turnstile CAPTCHA alternative. This gem should work with Rails 6.x and 7.x, and with Faraday 1.x and 2.x.

SimpleCaptcha is available to be used with Rails 3 or above and also it provides the backward compatibility with previous versions of Rails.

Solve Media CAPTCHA Replacement

Ruby wrapper for Yandex.Cleanweb

This version include two important page 'Contact' and 'Register' with the 'Math-Captcha' method submit for prevent hacker attack.

Russian Post tracking toolset, consisting tracking form bot (since Russian Post is too retarded for normal API) and captcha solver/recognizer.

Simple captcha image generator gem

Anti-spam protection for your website

Description of RailsCaptcha.

Forked from https://github.com/kares/simple_captcha

This is mt first gem

Simple captcha

This gem enable to use Captchme. Anti spam, Monetize captcha and Audience qualification