A simple way to add honeypot captchas to Rails forms

Drop in feedback engine with customizable fields, and captcha available

Anti-spam protection for your website

jQuery slide captcha system with jQuery & jQuery UI for Rails 3

Simple, easy captcha for Sinatra

Solve Media CAPTCHA Replacement

TwoCaptcha allows you to solve captchas with manual labor

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.

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

Simple reverse captcha solution that consist in create a hidden field that should be always empty.

Simple Audio Extension to Simple Captcha

Block repetetive requests from logged_in users and shows captcha.

Captcha library which uses imagemagick to create captchas

My version of SimpleCaptcha

This version include two important page 'Contact' and 'Register' with the 'Math-Captcha' method submit for prevent hacker attack.