Akismet or Automattic Kismet is a spam filtering service. It attempts to filter link spam from blog comments and spam TrackBack pings. The filter works by combining information about spam captured on all participating blogs, and then using those spam rules to block future spam. Akismet is offered by Automattic, the company behind WordPress.com.
Launched on October 25, 2005, Akismet is said to have captured over 100 billion spam comments and pings as of October 2013.
The founder of Automattic, Matt Mullenweg created Akismet so that his mother could blog in safety. He was the sole developer until recently. The name was suggested by Matt’s sister Charleen.
Akismet was originally developed to integrate with a plugin for WordPress. It is now included by default in all WordPress builds since version 2.0 and activated in all WordPress.com-hosted blogs. A public Akismet API has resulted in third-party plugins for other platforms. To use Akismet with non-WordPress.com sites, it is necessary to obtain an API key. The API key is necessary in order for the site to communicate with the Akismet servers.
Version 3.1.1 of the Akismet plugin for WordPress is now available.
This update includes an improvement to the “Remove comment author URL” feature and merges the pingback DDOS protection from Akismet 2.x into the 3.x plugin line.
To upgrade, visit the Updates page of your WordPress dashboard and follow the instructions. If you need to download the plugin zip file directly, links to all versions are available in the WordPress plugins directory.
Download the plugin here at https://akismet.com/