Having trouble with spammers and trolls on your blog? Even though WordPress is one of the best blog platforms for preventing spammers and spam bots from posting blog comments and messing with the community on your blog, you may still need to install a CAPTCHA plugin to help get rid of spam on your blog. Be sure your settings have you using the official assassin AKISMET plugin, and then install one of these six useful WordPress CAPTCHA plugins to get rid of spam bots:
- Contact form with Captcha: This is a great plugin for creating a contact form with a built-in CAPTCHA system. It's easy to use, which is nice if you've never done a CAPTCHA contact form before, and it helps you automatically filter any spam you might still get in your email system.
- Key CAPTCHA: Many WordPress bloggers use this CAPTCHA system, which can actually be used as a CAPTCHA monetization system. The plugin can be used with login, comments, and custom forms that you create on your WordPress blog. You can use it in Flash and HTML5 and with BuddyPress.
- Simple CAPTCHA: Just like it sounds, this is a very simple CAPTCHA plugin, and it doesn't take up a ton of space. Visitors are asked to complete a simple math problem, which deters trolls and spammers and shuts out spam bots. It might get a little annoying for some visitors, but it does do its job well.
- Are You a Human: This plugin challenges visitors with games to shut out bots and trolls. It's finding of a fun spin on the normal math equation or distorted word CAPTCHA system. You can use it on forums and the comment system in WordPress.
- NuCaptcha: This system uses video captchas to get rid of spam bots. It works with Contact Form 7 and BuddyPress, and it can be used for login, contact forms, the comment system, and more.
- WP-reCAPTCHA: This is the official Google CAPTCHA plugin. It’s a little harder to set up than some of the others, but it is extremely effective if you really need to combat trolls and spammers as much as possible.
These six helpful WordPress CAPTCHA plugins can help you get rid of trolls and spammers on your WordPress blog. While they are free, you may need to pay someone to set them up in the most effective manner, especially the more sophisticated options like ReCaptcha.
Whether you're just starting your WordPress blog or have been around for a while, it's important to stay on top of the latest CAPTCHA plugins that are compatible with WordPress. You may even find that you end up using multiple plugins because you prefer to use one CAPTCHA plugin for your custom forums and another for the native comments system, for instance. Being familiar with each of the options that are out there will help you more easily find the CAPTCHA system that works best for your blog.

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Nice post bro.. I think it will be better if you add the link for each one in the post.
Thanks for the suggestion, added links to each plugin, now users can check more details about CAPTCHA plugins on official WordPress Plugin page.
Rajesh, thanks for these tips. I haven’t used Captcha on my blogs yet. And I agree with Tushar, links would make a good post great. Thanks and best wishes for an awesome 2012. Peace and blessings from Orlando.
Article updated and links are added to each plugin, so users can easily download any plugin.
Good post. Would any of these be good for simply blocking bots signing up for my site scienceguardian.com where I am running 2.8.4? They keep signing up with inhuman names and although they never seem to comment, or very rarely, I would like my subscribers to be real people. Akismet and Bad Behavior dont seem to be working to stop them 100%.
I would like to add a Captcha to the sign up process, but none of these seem to mention specifically sign up.
Key CAPTCHA, Are You a Human, NuCaptcha provide option to show CAPTCHA on registration page.
Hello,
because we were annoyed by most of the existing CAPTCHAs, we decided to develop a new CAPTCHA system. It can be used within any system which is programmed in PHP, such as WordPress. It is free of charge. Maybe, you take 1 minute of your time and have a look at it, weblink below. If you have any questions, feel free to ask.
Best regards
Tom
Why not to create plugin based on your system, people prefer plugin instead of manually adding code.
Thanks for such a nice post. I am wondering for this kind of article; I am getting too much spam comments on my blog, Surely one of this plugin will help me
Cool Collection. I think WordPress Users have good alternatives to protect themselves against Spam.
Thanks for the article… Umm, no captcha on your comment form?
We were using some other methods to prevent spam. We’re using GASP plugin to prevent from SPAM
I just grabbed 2 items for use on my blog. Thanks for putting this together.
Hi thanks for this post I managed to get Akismet API for free and used it with the blue CAPTCHA plugin. Finally no more of these spammers on my site!
I have to choose between the 6 plugins to hunt down those spammers but I don’t want to make it difficult for the human visitor of my blog. So I am going to test these plugins one by one and see what’s the best for me!
Thanks Rajesh. WP-reCaptcha is Good. thanks for sharing the post..keep the good works going..:-)
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