Akismet

Akismet checks your comments and contact form submissions against our global database of spam to…


Automattic 3+ million active installs Tested with 4.8.1 Updated 2 weeks ago

Antispam Bee

Easy and extremely productive spam-fighting plugin with many sophisticated solutions. Includes protection against trackback spam…


pluginkollektiv 200,000+ active installs Tested with 4.7.5 Updated 4 months ago

WP-SpamShield Anti-Spam – All-in-One Spam Protection

All-in-one WordPress spam protection, with NO CAPTCHAs or other inconvenience to site visitors. The #1…


Scott Allen 100,000+ active installs Tested with 4.8.1 Updated 1 month ago

Email Address Encoder

A lightweight plugin to protect email addresses from email-harvesting robots by encoding them into decimal…


Till Kr├╝ss 90,000+ active installs Tested with 4.8.1 Updated 8 months ago

Growmap Anti Spambot Plugin

Defeat automated spambots (even the new 'learning' bots with dynamically named hidden fields) by adding…


Andy Bailey 40,000+ active installs Tested with 4.0.18 Updated 3 years ago

Spam Free WordPress

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


Todd Lahman, LLC 40,000+ active installs Tested with 4.4.10 Updated 2 years ago

Stop Spammers

Aggressive anti-spam plugin that eliminates comment spam, trackback spam, contact form spam, and registration spam.…


Bryan Hadaway 30,000+ active installs Tested with 4.8.1 Updated 1 week ago

WordPress Zero Spam

Zero Spam makes blocking spam comments a cinch. Install, activate and enjoy a spam-free site.…


Ben Marshall 20,000+ active installs Tested with 4.6.6 Updated 8 months ago

Stop Spam Comments

Dead simple and super lightweight anti-spambot WordPress plugin. No captcha, tricky questions or any other…


Pino Ceniccola 10,000+ active installs Tested with 4.4.10 Updated 2 years ago

WPBruiser {no- Captcha anti-Spam}

An extremely powerful antispam plugin that blocks spam-bots without annoying captcha images.


Mihai Chelaru 10,000+ active installs Tested with 4.8.1 Updated 3 days ago

Invisible Captcha

Smart invisible captcha for wordpress comments


Andrey Sorvin 10,000+ active installs Tested with 3.5.2 Updated 4 years ago

WP-Hashcash

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


Elliott Back 10,000+ active installs Tested with 3.0.5 Updated 7 years ago

Conditional CAPTCHA

Asks commenters to complete a simple CAPTCHA if they don't have a previously approved comment,…


Samir Shah 9,000+ active installs Tested with 4.7.5 Updated 9 months ago

Math Comment Spam Protection

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


Michael Woehrer 8,000+ active installs Tested with 3.0.5 Updated 7 years ago