TwoCaptcha allows you to solve captchas with manual labor

adds audio support to simple captcha

AntiCaptcha api ruby wrapper

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

Ruby port of VIT AutoCaptcha

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

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

Repackaged visualCaptcha's backend service, including translation and minor modification. Mainly for private use. Everything still belongs to original author: emotionLoop. ...

create captcha for api based project

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

you will get arithmatic sum with answer you just have to compare with ur user in controller

Unity Captcha is a gem that use two levels of Captcha. First level is about Left Hemisphere: Logic and Math. Second level is about Right Hemisphere: Intuition and Drawing. This two levels functioning in complete harmony creates unity and this is the base design of this Captcha.

Anti Captcha is an automated CAPTCHA solving service

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

Gem that uses RuCaptcha API to solver any type of captcha

This is a gem wrapper for tiny captcha in C with no dependencies.

这是一个验证码生成器。基于rucaptcha。本人只是将他的源码拉下来。为我的网站进行适配。因为我不使用sesion.id

Easy to use classical captcha for Rails apps

A gem to generate captcha pictures.

A Rails captcha gem that attempts to determine whether or not a user is human.