One of the techniques used by Black Hat SEO Webmasters to build Back Links is Spamming WordPress Comments, but fortunately there are mechanisms by which you can control WordPress comment SPAM by integrating Facebook comments for your WordPress Blog or Integrating Disqus & livefyre commenting system or by configuring WordPress Anti-Spam Plugins that allow you to run a more user-friendly, hassle-free comment system.
If you are new to WordPress read other Tutorials for working with WordPress comments section: How to Enable Pagination on WordPress Posts comments, How to Disable Comments on wordpress Posts
WordPress Anti Spam Plugins can be installed & Configured in few steps & they make sure you are protected from comment spam. Check out simple, fast, easy to use and lightweight Anti-Spam WordPress plugins listed below which does the job for you by saving your Blog from Spam Comments.
List of Best WordPress Anti-Spam Plugins :
1) Akismet :
The best & free anti-spam plugin for WordPress & we uses this plugin personally on our Blog. Akismet checks all new comments, trackbacks, 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.
Akismet required an API Key, but it is easy to install & configure. Akismet is “Set & Forget” Spam Protection for WordPress Blogs.

2) Peter’s Custom Anti-Spam :
Fully Loaded CAPTCHA-based anti-spam plugin for WordPress.All the visitors need to identify a custom word displayed on the CAPTCHA image before commenting. This plugin also comes with Auto-generated audio for visually impaired users.

3) Antispam Bee :
Antispam Bee is simple to use, anonymous and independent antispam solution. Detect comment and trackback spam. Includes statistics and notifications.

4) Captcha :
This plugin allows you to implement super security captcha form into web forms. Captcha plugin allows you to protect your website from spam using math logic which can be used for login, registration, resetting the password, comments forms.

5) 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 spambots.

This doesn’t stop Manual SPAM automatically.

6) AVH First Defense Against Spam :
AVH First Defense Against Spam plugin gives you the ability to block spammers before any content is served by identifying them at the Project Honey Pot, a local blacklist or the local IP cache. Visitors trying to post a comment are checked at Stop Forum Spam is not used to check before the content is served due to the number of requests, which overloads their infrastructure.

7) Defensio Anti-Spam :
Defensio aims to be an all-in-one anti-spam solution.It is an advanced spam filtering web service that learns and adapts to your behaviors and those of your users. In addition to simple spam filtering, we also provide world-class malicious content detection, profanity filtering, URL categorization, script detection and much more.
Advanced features such as support for OpenID, detailed statistics, charts and counter widget are also available.

This WordPress plugin Integrates reCAPTCHA anti-spam methods with WordPress including comment, registration, and email spam protection.

9) SI CAPTCHA Anti-Spam :
This WordPress Plugin adds CAPTCHA anti-spam methods to WordPress comments, registration, lost password, login & all other forms. This prevents spam from automated bots,adds security & works great with Akismet. It is fully  compatible with WP, WPMU, and BuddyPress.

10) Math Comment Spam Protection :
This WordPress Plugin asks the visitor making the comment to answer a simple math question. This is intended to prove that the visitor is a human being and not a automated spam robot.Example of such question: Sum of 9 + 9 ?
There are cases where Akismet labels genuine comments as SPAM [False Positive],but I don’t think that is much of an issue when compared to the level of Spam protection it offers to your WordPress Blog.

Do you use any other Anti-Spam WordPress Plugin to counter WordPress Comment SPAM? please post down your recommendations in the comments section.

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