Unobtrusive, flexible and complete spam protection for Rails applications using honeypot strategy for better user experience.

A plugin to make the process of creating a negative captcha in Rails much less painful

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

A library to make creating negative captchas less painful

reCAPTCHA was too much for us, so we created this. Simplest captcha ever.

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

DeathByCaptcha allows you to solve captchas with manual labor

Captcha-Plugin for Rails

A simple way to add honeypot captchas to Rails forms

BrainBuster - a logic captcha for Rails

Rack middleware Captcha verification using Recaptcha API.

TwoCaptcha allows you to solve captchas with manual labor

ActsAsTextcaptcha provides spam protection for Rails models with text-based logic question captchas. Questions are fetched from Rob Tuley's textcaptcha.com They can be solved easily by humans but are tough for robots to crack.

Tencent Cloud Ruby SDK is the official software development kit, which allows Ruby developers to write software that makes use of Tencent Cloud service CAPTCHA.

Despamilator is a plugin based spam detector designed for use on your web forms borne out of two annoyances: Spam being submitted in my web forms and CAPTCHAS being intrusive. Despamilator will apply some commonly used heuristics from the world of anti-spam to help you decide whether your users a...

Anti Captcha is an automated CAPTCHA solving service

A captcha solver (only for easy ones) gem

Captcha library which uses imagemagick to create captchas

A Google-style captcha for enterprise Rails apps

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