Antigate (Decode captcha service) wrapper for Ruby

Generates and verifies ascii art captcha.

generate captcha by dalli,use the memcache

IQ, Math Captcha

Simple captcha

A simple way to add honeypot captchas to Rails forms

create captcha for api based project

Drop in feedback engine with customizable fields, and captcha available

RMagickCaptcha is a gem that implements captcha for using in Rails application.

Simple, easy captcha for Sinatra

Captcha generator for rails

TwoCaptcha allows you to solve captchas with manual labor

A captcha that uses images instead of garbled text

Simple gem to add captcha or negative captcha to your Rails 3 application

simple stupid captcha

adds audio support to simple captcha

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.

Rails extension for Cloudflare's Turnstile CAPTCHA alternative. This gem should work with Rails 6.x and 7.x, and with Faraday 1.x and 2.x.

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

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.