Is Ironclad CAPTCHA WP plugin free?

Yes, Ironclad CAPTCHA WP plugin is free to use. It is available as a free plugin on WordPress.org.

How many websites use Ironclad CAPTCHA WP plugin?

Ironclad CAPTCHA WP plugin has 10 active installations as tracked by WordPress.org.

What are the best Ironclad CAPTCHA WP plugin alternatives?

Popular alternatives to Ironclad CAPTCHA WP plugin include Firelight Lightbox, Imsanity, Simple Lightbox. You can compare them side-by-side on our comparison pages.

Does Ironclad CAPTCHA WP plugin work with the latest WordPress?

Ironclad CAPTCHA WP plugin has been tested up to WordPress 3.3.2. It requires WordPress 2.3.1+ and PHP false+.

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Ironclad CAPTCHA WP plugin

Name: Ironclad CAPTCHA WP plugin
Rating: 1 (1 reviews)
Author: Andrey Yeriomin

3D objects-based CAPTCHA to get rid of spam in comments.

By Andrey Yeriomin·Image·Free

1(1 reviews)

·10 active installs·Updated 14 years ago

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As of April 2026, Ironclad CAPTCHA WP plugin is a WordPress image plugin with 10 active installations and a 1/5 rating from 1 reviews. It has been downloaded 9.8K+ times in total. Requires WordPress 2.3.1+ and PHP false+. Available on WordPress.org since 2010. Last updated 14 years ago — may have compatibility concerns. Top alternative: Firelight Lightbox.

1/51 reviews

10active installs

9.8K+total downloads

16 yearssince 2010

Overview

With this plugin you can easily install and use Ironclad CAPTCHA in your WordPress blog. 3D captcha renders several intersecting colored and rotated objects and asks user to count objects of some type. Humans can easily do it (much easier than read twisted text) and bots can’t do it at all and never will. Moreover, this captcha stops even spammers with human-based recognition of captchas, as Ironclad CAPTCHA has very unusual answer entering process. Just install the plugin, register and get API key on the official site (for free) and forget about spam forever.

Configuration

Go to Settings section in WP control panel and then to Ironclad CAPTCHA sub-section. You should get API-key to for your blog/site to make Ironclad CAPTCHA appear on it. In order to do this you should register her…

Read full description on WordPress.org