Akismet Anti-Spam

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


Automattic 5+ million active installations Tested with 5.3 Updated 4 enaku ago

Antispam Bee

Antispam plugin with a sophisticated tool set for effective day to day comment and trackback…


pluginkollektiv 500,000+ active installations Tested with 5.2.4 Updated 2 months ago

Email Address Encoder

A lightweight plugin that protects email addresses from email-harvesting robots, by encoding them into decimal…


Till Kr├╝ss 100,000+ active installations Tested with 5.3 Updated 3 enaku ago

WordPress Zero Spam

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


Ben Marshall 30,000+ active installations Tested with 5.2.4 Updated 5 months ago

Blackhole for Bad Bots

Blackhole is a WordPress security plugin that detects and traps bad bots in a virtual…


Jeff Starr 10,000+ active installations Tested with 5.3 Updated 6 enaku ago

Spam Free WordPress

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


Todd Lahman, LLC 10,000+ active installations Tested with 4.4.20 Updated 4 years 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 installations Tested with 4.4.20 Updated 4 years ago

IP Ban

Simple IP Ban is a lightweight ip / user agent ban plugin.


Sandor Kovacs 9,000+ active installations Tested with 4.7.15 Updated 3 years ago

Spam Destroyer

Kills spam dead in it's tracks. Be gone evil demon spam!


Ryan Hellyer 8,000+ active installations Tested with 5.2.4 Updated 7 months ago

Gravity Forms Zero Spam

Enhance your Gravity Forms to include anti-spam measures originally based on the work of David…


GoWP 7,000+ active installations Tested with 4.9.12 Updated 1 year ago

Conditional CAPTCHA

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


Samir Shah 6,000+ active installations Tested with 5.0.7 Updated 1 year ago

WP-Hashcash

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


Elliott Back 6,000+ active installations Tested with 3.0.5 Updated 9 years ago

Simple Trackback Validation

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


Michael Woehrer 4,000+ active installations Tested with 2.9.2 Updated 10 years ago