CheckBot

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


Constantine Anikin. 800+ active installations Tested with 4.0.33 Updated 7 years ago

BotBlocker

Kills spam-bots, leaves humans standing. No CAPTCHAS, no math questions, no passwords, just spam blocking…


Lform Design (Brandon Fenning) 800+ active installations Tested with 3.3.2 Updated 9 years ago

Spam Captcha

This plugins avoids spam actions on your website (comments and contact form if you use…


SedLex 800+ active installations Tested with 4.5.24 Updated 5 years ago

WP No-Bot Question

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


Compdigitec 700+ active installations Tested with 5.4.7 Updated 1 year ago

Advanced Invisible Anti-Spam

Block bots without annoying captchas. Cache friendly solution with rotating keys! Blocks comment, registration, and…


Matt Keys 700+ active installations Tested with 4.5.24 Updated 5 years ago

Quiz

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


Andy Skelton, Stephen Rider and Mark Jaquith 700+ active installations Tested with 4.1.33 Updated 6 years ago

Image Captcha

An easy to use wordpress Captcha plugin to prevent spam on your site. You can…


Captcha Soft 700+ active installations Tested with 4.9.18 Updated 3 years ago

Peter’s Custom Anti-Spam

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


Peter Keung 600+ active installations Tested with 4.8.17 Updated 7 years ago

Math Quiz

Math Quiz generates dynamic math problem in the comment form to beat spam robots.


ATI 600+ active installations Tested with 5.2.12 Updated 2 years ago

BuddyPress Captcha

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


Hardeep Asrani 600+ active installations Tested with 4.1.33 Updated 6 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

Sock'Em SPAMbots

A more seamless approach to deflecting the vast majority of SPAM comments.


Blobfolio, LLC 600+ active installations Tested with 5.8.1 Updated 2 months ago

Eazy CF Captcha

Eazy C(omment)F(orm) Captcha adds a mathematic exercise to the comment form, contact form 7 &…


Tamás Kiss 500+ active installations Tested with 5.8.1 Updated ཉིནམ་ 7། ago

Contact Form 7 Honeypot Plus

Contact Form 7 Honeypot Plus – Adds honeypot plus anti-spam functionality to Contact Form 7…


wpdebuglog 500+ active installations Tested with 5.7.3 Updated 6 months ago