simple stupid captcha

adds audio support to simple captcha

Gem that uses RuCaptcha API to solver any type of captcha

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

It's a Rails Captcha Engine for Rails 3 applications.

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

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

DeathByCaptcha allows you to solve captchas with manual labor

Rails extension for Cloudflare's Turnstile CAPTCHA alternative. This gem should work with Rails 6.x, 7.x, 8.x and with Faraday 1.x and 2.x.

Rack middleware Captcha verification using Recaptcha API.

BrainBuster - a logic captcha for Rails

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.

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...

FerrumMCP is a browser automation server that implements the Model Context Protocol (MCP), enabling AI assistants to interact with web pages through a standardized interface. Features include navigation, form interaction, content extraction, screenshot capture, JavaScript execution, cookie manage...

Arithmetic Captcha

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Drop in feedback engine with customizable fields, and captcha available

Form protection with simple captcha calculations.

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

Helps humankind with simpler captchas