IQ, Math Captcha

This is mt first gem

MVC based Math, Logic Captcha

create captcha for api based project

Quick little arithmetic plain-text captcha

Simple lib to generate a math_captcha to prevent spammers in form. Supports localization.

Forked from https://github.com/kares/simple_captcha

Description of RailsCaptcha.

Anti-spam protection for your website

Simple captcha based on plain text questions.

Captcha generator for rails

TwoCaptcha allows you to solve captchas with manual labor

This plugin adds helpers for the YinXiangMa CAPTCHA API

A simple way to add zero friction captchas to Rails forms

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

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

Generates Text Catpchas, that are 'nice' by my own personal definition!

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