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

A gem to generate captcha pictures.

Due to many unrequited complaints to the recaptcha team with regard to its unreadability for real human users, this gem offers a more readable selection of captcha images.

To help with keep the bots at bay this gem helps you easily add honeypots to forms and/or obfuscate your form field names

Metabypass | Ruby-based easy implementation for solving any type of captcha by Metabypass

A simple and custom captcha for Rails3.

Ruby package for easy integration with the API of 2captcha captcha solving service to bypass recaptcha, hcaptcha, funcaptcha, geetest and solve any other captchas.

Captcha-Plugin for Rails

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

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

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

Ruby wrapper for Yandex.Cleanweb

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

It's a Rails Captcha Engine for Rails 3 applications.

Generates Text Catpchas, that are 'nice' by my own personal definition!

Antigate (Decode captcha service) wrapper for Ruby

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

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

Captcha based on encyrpting and decrypting user data by mathematical operation

Description of TinyCaptcha.