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Unobtrusive, flexible and complete spam protection for Rails applications using honeypot strategy for better user experience.

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...

Captcha-Plugin for Rails

SimpleCaptcha is available to be used with Rails 3 + 4 or above and also it provides the backward compatibility with previous versions of Rails.

reCAPTCHA was too much for us, so we created this. Simplest captcha ever.

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

DeathByCaptcha allows you to solve captchas with manual labor

Description of TinyCaptcha.

RubyGem package for visualCaptcha's backend service

Rack middleware Captcha verification using Recaptcha API.

Captcha Gem for Rails, which generates captcha image by Rust.

A captcha solver (only for easy ones) gem

generate captcha by dalli,use the memcache

Quick little arithmetic plain-text captcha

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

RedisCaptcha provides simple captcha that can be read by human.

Solve Media CAPTCHA Replacement

A simple way to add zero friction captchas to Rails forms

Simple gem to add captcha or negative captcha to your Rails 3 application