Use Turnstile by Cloudflare to perform captcha validation in your Rails app

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

AntiCaptcha api ruby wrapper

A captcha that uses images instead of garbled text

Simple Audio Extension to Simple Captcha

Captcha library which uses imagemagick to create captchas

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

Define questions and answers in a YAML file and validate your models with a single line of code. No more captchas or other stupid tricks.

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

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

A simple and fast image captcha generator that uses opencv and memcached.

Simple captcha

A honeypot style captcha extension for ActiveRecord. Simple one-line inclusion in the model combined with a simple form field should trap the bad guys in the molasses.

wxianfeng_simple_captcha is captcha for rails,modified from simple_captcha .

Ruby wrapper for Yandex.Cleanweb

Google reCaptcha helpers and verifier

Ruby port of VIT AutoCaptcha

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

Display and verify arcaptcha service captcha

Submit captcha images and retrieve the text as a string.