WordPress is a free and open source blogging tool and a content management system (CMS) based on PHP and MySQL.
WordPress considered as the best CMS amongst all of its competitors because it offers number of features and plugins which enable users to optimize and beautify their websites and web applications easily.
This article includes 12 Free WordPress Anti Spam Plugins which will protect your websites from spam comments and activities.
Following plugins has myriad of features and you can easily setup these plugins to protect your websites without any hassle.
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1. Akismet
This is one of the oldest and most popular antispam plugin which has more than 1 million active installs. Akismet checks your comments against the Akismet Web service to see if they look like spam or not and lets you review the spam it catches under your blog’s “Comments” admin screen.
2. SI Captcha Anti-Spam
This plugin is quite easy to use which lets you add anti-spam methods to WordPress forms for comments, registration, lost password, login page. In order to post comments or register, users will have to type in the code shown on the image. This prevents spam from automated bots and provides extra security and it also works great with Akismet plugin.
3. Anti-spam
This plugin uses JavaScript to avoid bots and it blocks spam in comments automatically for users and admins. This plugin doesn’t require any captcha method nor moderation queues and setting page as it is great to forget about spam and keep admin section clean.
4. WP SpamShield Anti-Spam
This is an exceptionally powerful and user-friendly WordPress anti-spam plugin that eliminates comment spam, trackback spam, contact form spam & registration spam. This plugin doesn’t require any captcha and works silently in background and simply makes WordPress spam disappear.
5. Antispam Bee
Antispam Beeblocks spam comments and trackbacks effectively and without captchas. It is free of charge, ad-free and compliant with European data privacy standards. Antispam Bee keeps an eye on users IP address to filter spam comments and also keeps counter of spam comments.
6. Stop Spammers Spam Prevention
Stop Spammers is an aggressive website spam defense against comment spam and login attempts. It is capable of performing more than 20 different checks for spam and malicious events and can block spam from over 100 different countries. There are 12 pages of options that can be used to configure the plugin to your needs.
7. Advanced Invisible Anti-Spam
This solution works automatically without any user configuration, and puts no additional burden on your users. After activation this plugin will go to work stopping: comment spam, spam bot registration, and bbPress spam. This plugin is fully compatible with WordPress cache plugins, lightweight, clean, and uses native JavaScript to avoid jQuery dependencies.
8. WordPress Zero Spam
WordPress Zero Spam blocks registration spam and spam in comments automatically without any additional config or setup. Just install, activate, and enjoy a spam-free site. it has myriad of features like no captcha, no moderation queues, supports caching plugins, blog spammy IPs, theme and plugin integration, optional logging, and advanced settings.
9. Growmap Anti Spambot Plugin
This plugin will add a client side generated checkbox to your comment form asking users to confirm that they are not a spammer. It is a lot less trouble to click a box than it is to enter a captcha and because the box is generated via client side JavaScript that bots cannot see, it should stop 99% of all automated spam bots.
A check is made that the checkbox has been checked before the comment is submitted so there’s no chance that a comment will be lost if it’s being submitted by legitimate human user.
To combat the new ‘learning’ bots, this plugin adds dynamically named fields to the comment form so each post has a differently named field and value. You can set the maximum amount of comments a user can have in the moderation queue to protect you from comment floods (provided you haven’t approved any of the spammers comments before).
10. NoSpamNX
NoSpamNX automaticly adds additional formfields to your comment form, invisible to human users. If a spambot fills these fields blindly (which most of all spambots do), the comment will not be saved. You can decide if you want to block these spambots or mark them as spam. Furthermore, you can put common spam-phrases on a local Blacklist or (if you have multiple Blogs) on a global Blacklist. This comes very handy when fighting against “handmade” Spam.
11. WP Bruiser
WPBruiser (formerly GoodBye Captcha) is an anti-spam and security plugin based on algorithms that identify spam bots without any annoying and hard to read captcha images.
WPBruiser completely eliminates spam-bot signups, spam comments, even brute force attacks, the second you install it on your WordPress website. It is completely invisible to the end-user – no need to ever fill out a Captcha or other “human-detection” field ever again – and it just works!
12. Spam Destroyer
Spam Destroyer simply stops automated spam while remaining as unobtrusive as possible to regular commenters. This plugin is intended to be effortless to use, all you have to do is install, and enjoy spam free websites.
