Securimage-WP

Block comment spam, malicious logins, and automated registrations by adding the powerful CAPTCHA protection of…


Drew Phillips 3,000+ active installations Tested with 4.9.16 Updated 3 years ago

Simple Trackback Validation

Performs a simple but very effective test on all incoming trackbacks in order to stop…


Michael Woehrer 3,000+ active installations Tested with 2.9.2 Updated 11 years ago

Math Comment Spam Protection

Asks the visitor making the comment to answer a simple math question. This is intended…


Michael Woehrer 3,000+ active installations Tested with 3.0.5 Updated 10 years ago

WP Spam Fighter

Comment spam prevention without moderation, captchas or questions


Henri Benoit 2,000+ active installations Tested with 4.1.32 Updated 6 years ago

Block Spam By Math Reloaded

This plugin protects your WordPress and Buddypress login, comments, and new user/new blog signup process…


James Pegram 1,000+ active installations Tested with 3.3.2 Updated 8 years ago

En Spam

Block spam with cookies and JavaScript. All Spambots will remain away from your blog. Without…


Hatul 1,000+ active installations Tested with 5.6 Updated 2 months ago

CheckBot

This antispam plugin provides very simple(one-click) and powerful captcha for your blog.


Constantine Anikin. 900+ active installations Tested with 4.0.32 Updated 6 years ago

WP No-Bot Question

Simple question that blocks most spambots (and paid robots) by making them answer a common…


Compdigitec 800+ active installations Tested with 5.4.4 Updated 6 months ago

Quiz

Reduces spam and troll comments by requiring commenters to answer a question.


Andy Skelton, Stephen Rider and Mark Jaquith 800+ active installations Tested with 4.1.32 Updated 6 years ago

Peter’s Custom Anti-Spam

Stop a lot of spambots from polluting your site by making visitors identify a custom…


Peter Keung 700+ active installations Tested with 4.8.15 Updated 6 years ago

BuddyPress Captcha

This plugin adds Google's reCAPTCHA form to your BuddyPress' registration page to keep your community…


Hardeep Asrani 700+ active installations Tested with 4.1.32 Updated 5 years ago

yaCAPTCHA

yaCAPTCHA is a CAPTCHA plugin for WordPress that helps you block comment spam from automated…


Rémy Roy 600+ active installations Tested with 3.0.5 Updated 11 years ago

La Sentinelle antispam

Feel safe knowing that your website is safe from spam. La Sentinelle will guard your…


Marcel Pol 600+ active installations Tested with 5.6 Updated 3 weeks ago

MP Spam Be Gone

MP Spam Be Gone is the simplest, most effective Spam blocker.


MikesPickz Web Solutions, Inc. 600+ active installations Tested with 5.6 Updated 2 weeks ago

Antispam

Anti-spam check the robots by behavior. No captcha. Antispam let robots do so as a…


Eugen Bobrowski 500+ active installations Tested with 4.7.19 Updated 4 years ago

Nonce, Please!

"Nonce, Please!" is a simple plugin that prevents brute-force comments and trackbacks from spammer. This…


IKEDA Yuriko 500+ active installations Tested with 3.0.5 Updated 11 years ago