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Todd Lahman's comment spam blocking plugin that blocks automated spam with zero false positives.

By: Todd Lahman.

(41)
Last Updated: 1 year ago
60,000+ active installs
Compatible up to: 4.4.5

Bad Behavior prevents spammers from ever delivering their junk, and in many cases, from ever reading your site in the first place.

By: error.

(21)
Last Updated: 1 month ago
60,000+ active installs
Compatible up to: 4.6.1

Powerful anti-spam plugin that eliminates blog comment spam. Finally, you can enjoy a spam-free WordPress blog! Includes contact form.

By: Pole Position Marketing and Aziz.

(5)
Last Updated: 7 days ago
40,000+ active installs
Compatible up to: 4.5.4

This plugin utilizes Google reCAPTCHA to help your blog stay clear of spams. BWP reCAPTCHA supports no CAPTCHA reCAPTCHA, Contact Form 7 and Akismet.

By: Khang Minh.

(53)
Last Updated: 9 months ago
30,000+ active installs
Compatible up to: 4.4.5
(26)
Last Updated: 4 months ago
20,000+ active installs
Compatible up to: 4.5.4

To protect your Blog from automated spambots, this plugin adds invisible formfields to your comment form.

By: kubi23.

(12)
Last Updated: 5 months ago
10,000+ active installs
Compatible up to: 4.4.5

No more SPAM by spiders scanning you site for email adresses. With CryptX you can hide all your email adresses, with and without a mailto-link, by con

By: Ralf Weber.

(10)
Last Updated: 2 years ago
10,000+ active installs
Compatible up to: 4.1.13

Client-side javascript blocks all spam bots. XHTML 1.1 compliant.

By: and Donncha O Caoimh.

(2)
Last Updated: 7 years ago
10,000+ active installs
Compatible up to: 3.0.5
(18)
Last Updated: 2 months ago
10,000+ active installs
Compatible up to: 4.2.10
(20)
Last Updated: 4 months ago
9,000+ active installs
Compatible up to: 4.5.4

Contact form with captcha plugin allows you to use a Google reCAPTCHA contact form on your blog. It requires PHP 5.0 or later.

By: Technology Blog.

(13)
Last Updated: 1 year ago
9,000+ active installs
Compatible up to: 4.2.10

Sabre is an acronym for Simple Anti Bot Registration Engine. It's a set of counter measures against spam registration on your blog.

By: dlo.

(11)
Last Updated: 4 years ago
8,000+ active installs
Compatible up to: 3.3.2

Several types of captcha to protect your site in one easy to use plugin.

By: wppal.

(10)
Last Updated: 3 years ago
7,000+ active installs
Compatible up to: 3.5.2
(20)
Last Updated: 3 months ago
6,000+ active installs
Compatible up to: 4.6.1

Comment spam prevention without moderation, captchas or questions

By: benohead and amazingweb-gmbh.

(2)
Last Updated: 2 years ago
3,000+ active installs
Compatible up to: 4.1.13

Blue Captcha is a powerful and highly customized WordPress plugin that effectively protects your WP blogs from spammers and unwanted persons.

By: J. Kokkalis (BlueCoder).

(12)
Last Updated: 1 year ago
2,000+ active installs
Compatible up to: 4.2.10

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