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

BrainBuster - a logic captcha for Rails

Rack middleware Captcha verification using Recaptcha API.

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.

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...

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.

Arithmetic Captcha

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

RubyGem package for visualCaptcha's backend service

ALTCHA is a free, open-source CAPTCHA alternative that protects your website from spam and abuse

Drop in feedback engine with customizable fields, and captcha available

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0-9 arası sayıları kullanarak random olarak 2 sayı seçer ve yine random olarak toplama ya da çarpma yaparak sonucu verir.

AntiCaptcha api ruby wrapper

My version of SimpleCaptcha

Repackaged visualCaptcha's backend service, including translation and minor modification. Mainly for private use. Everything still belongs to original author: emotionLoop. ...

API to interact with BrandCAPTCHA http://www.pontamedia.com/en/brandcaptcha/

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