WordPress.org

Have been using it for a couple years and works really good, especially if you have any forms that need to filled out... stops almost all bots from accessing them!

Works well with Better WP Security plugin as well.

Thanks

The best firstline of defence!
Must have on every CMS. I use this on all sites (drupal and wordpress). Donate to keep this project alive.

Blocks spam like a ninja!

We've been running this plugin for several months now and since install along with a captcha plugin our site has only seen a few spammers get through.

Works extremely well, you won't believe the junk that it blocks. Donate to this plugin to make sure it keeps getting better.

Works together with other anti-spam plugins to keep my sites nice and clean.

Solved an annoying spam problem via the site's contact form. Well worth installing.

I'm a long time user, and I love this thing! I have 3000 spam a month that I never see thanks to Bad Behavior.

For me, it's a must have plugin to protect your site against spam