A simple and lightweight yet rock-solid plugin that blocks comment spam using multiple automatic detection methods.
Alternatives to Spam Blocker S1
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.
Completely disables all backend comment submissions (wp-comments-post.php, REST API, XML-RPC) to stop ghost comment spam.
Simple Spam Blockerv2.0.0
Simple Spam Blcoker stop spam comments and also can be used to stop bots to try to login into admin panel.
Habibur Comment Blockerv1.0.0
Effortlessly disable comments and pingbacks sitewide to improve performance and security.
Data443 Anti-Spamv1.0.2
Blocks comment and form spam by classifying the URLs it contains against the Data443 classification API.
Kama SpamBlockv2.0.0
Light and invisible protection against basic automated comment spam. Pings and trackbacks check for real backlinks.
Modular dual-layer anti-spam protection for WordPress forms and comments with custom TLD and email filtering.
Block specific email addresses from using your WordPress site. Stop fake orders, spam registrations, and unwanted comments.
Protect your forms from spam with 99.9% accuracy - no CAPTCHA, no JavaScript, no tracking. Trusted by 3.5M+ websites.
Blocks registrations, WooCommerce checkouts, and comments that use disposable (throwaway) email addresses, with custom block and allow lists.