A simple and lightweight yet rock-solid plugin that blocks comment spam using multiple automatic detection methods.
Alternatives to Simple Spam Blocker
Plugins below are selected for functional relevance and current directory signals. Active-install counts do not affect this ranking.
Relevant replacements
WordPress plugins with similar use cases
Compatibility and update metadata provide context, not a quality guarantee. Review each plugin’s details for your site.
AOS Comment Spam Cleanupv1.6.3
Clean up comment spam by URL pattern, schedule auto-cleanups, block bots with a honeypot, and auto-score comment quality — all in one panel.
The most complete free WordPress anti-spam plugin. Protects Contact Form 7, comments, login, registration, REST API, and XML-RPC — all in one shield.
Zero-DB, zero-external-JS honeypot anti-spam for WordPress comments, core forms, and popular form plugins. Invisible to humans, a void to bots.
Honeypot Toolkitv5.0.4
Automatically insert Project Honeypot links into your pages and block IP addresses that are listed on various block lists you can choose from.
BlueFairy AntiSpamv1.2.2
We hate spam. No CAPTCHAs. No third-party puzzles. Just invisible traps that catch bots and let real people through.
Stops spam in comments, registration, WooCommerce and contact forms. No CAPTCHA, no external services. Formerly WP Spam Protecter. Free.
Onsite Spam Guardv1.7.1
Spam protection for comments, Contact Form 7, WooCommerce, Jetpack and WP Job Manager forms — no external services, API keys or CAPTCHAs.
Mimic Guardv1.4.0
Block spam submissions with honeypot fields and submission timing checks.
Gecka Antispamv1.3.0
Stops spam on every form without a captcha: honeypot, timing checks and a filter that learns from your moderation. Nothing leaves your server.