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

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

This is a Captcha gem for Rails Applications. It drawing captcha image with C code so it no dependencies.

A library to make creating negative captchas less painful

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.

DeathByCaptcha allows you to solve captchas with manual labor

Captcha-Plugin for Rails

A simple way to add honeypot captchas to Rails forms

Rack middleware Captcha verification using Recaptcha API.

BrainBuster - a logic captcha for Rails

TwoCaptcha allows you to solve captchas with manual labor

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...

A Google-style captcha for enterprise Rails apps

A Google-style captcha for enterprise Rails apps

A captcha verification approach for Rails apps, directly integrated into ActiveRecord’s validation mechanism and providing helpers for ActionController and ActionView.

SimpleCaptcha is the simplest and a robust captcha. Its implementation requires adding up a single line in views and in controllers/models. SimpleCaptcha is available to be used with Rails2.0 or above and also it provides the backward compatibility with previous versions of Rails.

A captcha solver (only for easy ones) gem

Anti Captcha is an automated CAPTCHA solving service