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Owner Acquia
Commercial Yes
Registration Required
Launched 31 March 2008; 9 years ago (2008-03-31)
Current status Online

Mollom is a web service that analyzes the quality of content posted to websites. This includes comments, contact-form messages, blogs, and forum posts.[1] Mollom screens all contributions before they are posted to participating websites.


Mollom was originally developed by Dries Buytaert, who was also the founder and lead developer of the Drupal CMS. It uses three specific technologies to detect spam and malicious content - machine learning, text analytics, and CAPTCHA. According to the company, Mollom has blocked over one billion spam messages for its customers, including Sony Music, Stanford University, and Twitter.[2]

Mollom was acquired by Acquia in August, 2012.[3]