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

Captcha-Plugin for Rails

A library to make creating negative captchas less painful

A very simple rack captcha middleware via captchator.com API

Captcha-Plugin for Rails

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

A simple way to add honeypot captchas to Rails forms

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

Captcha library which uses imagemagick to create captchas

Captcha-Plugin for Rails

TwoCaptcha allows you to solve captchas with manual labor

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

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

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

Captchator as Rack middleware, and helpers for sinatra.

Captcha based on encyrpting and decrypting user data by mathematical operation

Submit captcha images and retrieve the text as a string.

Due to many unrequited complaints to the recaptcha team with regard to its unreadability for real human users, this gem offers a more readable selection of captcha images.

A simple way to add zero friction captchas to Rails forms

Wrapper for Captchabot.com