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Alternatives
Software like SpamScrubber
What else does this job. Matched on what each project does, not on who links to whom.
Closest first
- WP Spammerwordpress.orgWP Spammer is a free WordPress plugin designed to block spam comments on websites without the need for captchas. It offers a simple activation process and helps site owners maintain clean comment sections effortlessly.
- Anti-spam Reloadedwordpress.orgAnti-spam Reloaded is a WordPress plugin that blocks automated spam comments and trackbacks without CAPTCHA. It can retain blocked comments in the spam area for review and supports sites with JavaScript disabled.
- Captcha Spam Blockerwordpress.orgCaptcha Spam Blocker is a WordPress plugin that integrates dynamic CAPTCHA across WordPress and WooCommerce forms, including login, registration, comments, and checkout. It helps site owners block spam and bot access while ensuring GDPR compliance.
- AntiSpam Shield by LukaCodeswordpress.orgAntiSpam Shield by LukaCodes is a WordPress plugin that protects sites from comment spam, brute-force logins, and bot registrations. It integrates with reCAPTCHA v3 and Cloudflare Turnstile, offering lightweight, no-bloat security for WordPress administrators.
- Invisible Anti-Spam & CAPTCHAwordpress.orgInvisible Anti-Spam & CAPTCHA is a WordPress plugin that protects every form, login, registration, and checkout with invisible cryptographic proof-of-work challenges. It works with Contact Form 7, WPForms, Gravity Forms, WooCommerce, and many others. Real users never see anything while bots are effectively blocked or economically disincentivized.
- Analytical Spam Filterwordpress.orgAnalytical Spam Filter is a WordPress plugin that uses behavioral analysis to block spam submissions without requiring captchas, accounts, or external services. It tracks user behavior, IP reputation, and content patterns to distinguish legitimate users from bots, providing privacy-friendly spam protection.
- SpamJamwordpress.orgSpamJam is a free WordPress plugin that automatically blocks spam comments and registrations using honeypot techniques and behavioral analysis. It operates invisibly, requiring no captchas or user intervention, and is designed for WordPress site owners seeking hassle-free spam prevention.
- Spam Comment Removerwordpress.orgSpam Comment Remover is a WordPress plugin that automatically detects and removes spam comments, blocking hidden links, gibberish, and automated submissions. It requires no setup and helps site owners maintain clean comment sections effortlessly.
- PRyC WP: AntiSPAM (without CAPTCHA)wordpress.orgPRyC WP: AntiSPAM (without CAPTCHA) protects WordPress comment forms from spam bots by implementing a hidden honeytrap field along with additional validation tricks. It blocks automated submissions while allowing real users to comment normally. The plugin does not replace human moderation tools like Akismet and works alongside them.
- SpamScoutwordpress.orgSpamScout is a WordPress plugin designed to block spam submissions using an invisible and lightweight method. It provides automatic spam filtering for WordPress sites, helping administrators maintain clean and secure content. The plugin has been permanently closed as of April 2026.
- Zero Spam for WordPresswordpress.orgZero Spam for WordPress is a free plugin that protects WordPress websites from spam, bots, and malicious attacks. It integrates with global IP reputation providers, blocks threats dynamically, and requires no captchas or moderation queues. Designed for site owners seeking automated security.
- Anti-Spam Protection – No API Key, GDPR Friendlyfullworksplugins.comFullworks Anti Spam is a WordPress anti-spam plugin for protecting client and site-owner websites from spam in comments and forms. It is described as suitable for WordPress site owners and for people managing clients’ sites, with support for major form plugins and “many other forms.” Its listed features include bot spam protection without Captcha or other user quizzes, IP blocklist checking, human spam protection using machine learning, site visitor privacy controls, allow and deny lists, and real-time stats on blocked requests from bots, humans, and IPs. The plugin also says it disables transmission so that website visitor messages and comments stay on the site, which is presented as helping with GDPR and UK GDPR compliance. It also includes automatic approval for trusted users or terms while blocking unwanted ones. The plugin is offered with easy installation and simple setup, and the page highlights premium support. Pricing includes a free 30-day trial and paid annual plans for a single site, a 20-site developer package, and a 100-site agency package. It also mentions a custom plan for sites at scale, and states that all plans include unlimited spam protection and all available features.
- QWeb Spam Shieldqwebspamshield.comQWeb Spam Shield is a WordPress plugin that protects every form, comment section, user registration, product review, and WooCommerce checkout from spam and abuse. It runs entirely on your own server with no external API calls, no CAPTCHA challenges for visitors, and includes built-in card-testing defenses. It supports all major form plugins plus a universal fallback.
- Simple Spam Blockerwordpress.orgSimple Spam Blocker is a WordPress plugin that uses honeypot techniques to block spam comments, prevent spam registrations, and stop bots from attempting to log in. It integrates with Ultimate Member and can be added to forms via shortcode, providing easy and effective spam protection for WordPress site owners.
- WordPress pluginwordpress.orgSmart CAPTCHA Alternative with Cloudflare Turnstile is a WordPress plugin that integrates Cloudflare's privacy-friendly CAPTCHA alternative to protect forms from spam and bots. It supports various WordPress and WooCommerce forms, ensuring security and user privacy.
- Honeypot Anti-Spamwordpress.orgHoneypot Anti-Spam is a WordPress plugin that prevents comment spam using the honeypot technique. It requires no configuration, is invisible to users, and integrates natively with WordPress comment forms, providing lightweight and privacy-friendly spam protection.
- Captcha by BestWebSoftbestwebsoft.comCaptcha by BestWebSoft is a comprehensive WordPress plugin that protects login, registration, comments, WooCommerce checkout, and custom forms from spam using various captcha types including math problems and image-based challenges. It offers multiple difficulty levels and is designed to be user-friendly while remaining effective against bots. The plugin includes both free and premium versions with additional features.
- Spam Word Blockerwordpress.orgSpam Word Blocker is a WordPress plugin that blocks the publishing of posts, pages, or custom post types containing admin-defined unwanted words. It provides instant alerts, supports all post types, and ensures server-side enforcement for effective content moderation.
- Multi-Form Anti-Spam Image CAPTCHAwordpress.orgMulti-Form Anti-Spam Image CAPTCHA is a WordPress plugin that provides image-based CAPTCHA, honeypot fields, and accessibility-friendly spam protection for popular form plugins and core WordPress screens. It helps site owners prevent automated spam while maintaining usability for real users. The plugin supports multiple integrations and offers styling options.
- Spam Destroyerwordpress.orgSpam Destroyer is a WordPress plugin that filters automated spam comments while minimizing friction for legitimate commenters. It installs and activates without configuration, making it suitable for WordPress site owners who want basic comment-spam protection.
- WordPress pluginwordpress.orgSimple CAPTCHA Alternative with Cloudflare Turnstile is a WordPress plugin that integrates Cloudflare Turnstile CAPTCHA into various WordPress and WooCommerce forms. It helps site owners protect their sites from spam and bots while maintaining user privacy. The plugin is free and easy to set up, supporting a wide range of form plugins.
- Onsite Spam Guardwordpress.orgOnsite Spam Guard is a WordPress plugin that blocks spam in comments, WooCommerce product reviews, and Jetpack contact forms. It uses configurable guards such as honeypots, duplicate detection, submission timing, and keyword filtering, with local logging and no external services.
- Smart Spam Cleanerwordpress.orgSmart Spam Cleaner is a WordPress plugin that helps administrators remove spam users and posts using dynamic filters and background processing. It supports batch operations, customizable spam patterns, and non-blocking cleanup, making it suitable for site owners who need to maintain clean user and content databases.
- SilentShieldwordpress.orgSilentShield is a WordPress plugin that provides invisible captcha and anti-spam protection for popular form builders and login/registration forms. It works silently in the background, supporting Contact Form 7, WPForms, Elementor, and WooCommerce, and is privacy-focused with GDPR compliance.
- Advanced SmartCaptchawordpress.orgAdvanced SmartCaptcha is a WordPress plugin that integrates the Yandex SmartCaptcha service to protect site forms from spam and bots. It offers invisible captcha, login form protection, and easy setup for enhanced site security. Suitable for site owners seeking robust anti-spam measures.
- SpamOffwordpress.orgSpamOff is a WordPress plugin designed to protect WooCommerce stores and WordPress sites from bots, fake registrations, and spam. It addresses the challenge of unwanted automated activity by integrating Google reCAPTCHA into selected forms, allowing site owners to safeguard key user interactions. The plugin supports both reCAPTCHA v3, which is invisible and score-based, and reCAPTCHA v2, which uses a checkbox for user verification. Among its features, SpamOff offers protection for WooCommerce Classic Checkout as well as WooCommerce Block Checkout, with v3 providing token auto-refresh to prevent slow customers from being rejected due to expired tokens. It extends protection to customer login, registration, lost password forms, and WordPress comment forms. Site administrators can control which forms are protected through per-form toggles, and the plugin allows customization of failure messages and the appearance of the v2 widget, including theme and size adjustments. SpamOff can be manually placed on forms using the [spamoff_bot_protection] shortcode, giving users flexibility in implementation. It is also compatible with WooCommerce HPOS (Custom Order Tables), ensuring integration with modern WooCommerce features. Settings include the ability to select the reCAPTCHA type, input site and secret keys, and set a minimum score for v3. Advanced settings provide further control over which forms receive protection. The plugin is suitable for WordPress and WooCommerce site owners seeking to reduce spam and bot activity by leveraging Google reCAPTCHA technology. It is distributed as a plugin via the WordPress.org Plugin Directory.
- Tiny Comment Spam Blockerwordpress.orgTiny Comment Spam Blocker is a free WordPress plugin that protects websites from comment spam by employing multiple detection techniques, including honeypots, user agent validation, and forbidden word filtering. It is designed for easy integration and effective spam prevention.
- ChaLesswordpress.orgChaLess is a WordPress plugin that protects all forms on your site from spam and bots without requiring users to solve CAPTCHAs. It uses behavioral analysis and honeypot fields to block bots invisibly, improving user experience and form completion rates.
- Spam Defender – Email Blockerwordpress.orgSpam Defender – Email Blocker is a WordPress plugin that helps site owners block specific email addresses or domains from registering, commenting, or placing orders. It features an admin settings page for managing blocked emails and supports WooCommerce, making it ideal for preventing spam and fake activity.
- WordPress pluginwordpress.orgCheckout Captcha for WooCommerce is a WordPress plugin that integrates reCAPTCHA verification into WooCommerce checkout, login, registration, and password reset forms. It helps store owners prevent spam and bot transactions, improving security and user experience.
- Friendly Captcha for WordPresswordpress.orgFriendly Captcha for WordPress adds privacy-focused, proof-of-work anti-bot protection to WordPress forms. It helps website owners block spam and abuse without image-based CAPTCHA challenges or tracking users.
- Privacy CAPTCHA for Capwordpress.orgPrivacy CAPTCHA for Cap is a WordPress plugin that integrates the open-source Cap proof-of-work CAPTCHA into comments, login, registration, WooCommerce, and Gravity Forms. It offers privacy-friendly spam protection by running verification on the user's own infrastructure.
- WP Armour – Honeypot Anti Spamwordpress.orgWP Armour is a WordPress plugin that protects websites from spam by using honeypot anti-spam techniques. It integrates with popular forms and provides automatic, GDPR-compliant protection without requiring captchas or additional user steps.
- Manzari Anti-Spam Shieldwordpress.orgManzari Anti-Spam Shield is a lightweight WordPress plugin that protects comment forms from automated spam using honeypot fields, timing checks, keyword blocking, and optional Google reCAPTCHA v2. It operates silently to block bots while maintaining a clean user experience.
- GhostTrapwordpress.orgGhostTrap is a WordPress plugin that delivers advanced, invisible spam protection for comment forms using a multi-layered detection system. It blocks automated spam without requiring captchas or disrupting user experience. The plugin features real-time statistics, an enhanced admin interface, and is designed for WordPress site owners seeking professional spam blocking.
- Blue Captchawordpress.orgBlue Captcha adds configurable CAPTCHA protection to WordPress login, registration, comment, and password recovery forms. It offers seven predefined difficulty levels along with custom CAPTCHA settings for site administrators.
- EZ Anti-Spam Comments with reCAPTCHAwordpress.orgThis WordPress plugin uses JavaScript techniques and optional Google reCAPTCHA to block robotic spam comments. It also allows approved comments with high 'karma' values to be displayed as testimonials via widget or shortcode. Users can manually adjust karma and customize display options.
- Advanced Google reCAPTCHAwordpress.orgAdvanced Google reCAPTCHA is a WordPress plugin that integrates Google reCAPTCHA into various forms to protect against spam and brute-force attacks. It supports login, registration, comment, and e-commerce forms for enhanced site security.
- Spambargowordpress.orgSpambargo is a WordPress plugin that blocks spam submissions in forms, comments, and WooCommerce workflows. It uses keyword, link-count, and disposable-email checks across integrations including Elementor, Contact Form 7, JetFormBuilder, Ninja Forms, and WooCommerce.
Ranked by how close each one sits to SpamScrubber in the index, not by popularity. Back to SpamScrubber →