A library to make creating negative captchas less painful

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

Drop in feedback engine with customizable fields, and captcha available

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

Google reCaptcha helpers and verifier

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

TwoCaptcha allows you to solve captchas with manual labor

DeathByCaptcha allows you to solve captchas with manual labor

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

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

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

adds audio support to simple captcha

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

Anti Captcha is an automated CAPTCHA solving service

ZeroCaptcha allows companies to solve captchas with artificial intelligence software, which is faster than humans and very accurate

Captcha-Plugin for Rails

Captcha-Plugin for Rails

ReCaptcha implements view helpers to generate ReCaptcha code, with the noscript counterpart, required methods that interface with the HTTP API for captcha verification, a DSL to generate a before_filter and the code to implement AJAX captcha validation.

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