Water&stone released its 2011 Open Source CMS Market Share Report, which shows that Wordpress, Drupal and Joomla command the market, but Concrete5 had a great year and is a CMS to watch.

The report looks at the brand strength and market share of 20 open source web content management systems, and findings indicate that the market is both deeper and wider this year over 2010, making the "top 20" harder to call.

Top Twenty

The Top 20 open source content management systems listed in the report are (in alphabetical order):

  • Alfresco Web CMS
  • CMSMadeSimple
  • Concrete5
  • DotNetNuke
  • Drupal
  • e107
  • eZ Publish
  • Joomla!
  • Liferay
  • MODx
  • Movable Type
  • OpenCms
  • Plone
  • SilverStripe
  • Textpattern
  • Tiki Wiki CMS Groupware
  • Typo3
  • Umbraco
  • WordPress
  • Xoops

The report looked at rate of adoption and brand strength. Data gathered included downloads, installations and third-party support, but getting this data was problematic. For example, download data was not available for all the systems, so take the results with a big dash of salt. To determine weekly downloads, often the source relied on was a spokesperson for the CMS.


With a 517% increase in downloads, Concrete5 is this year's little CMS that could. Although Wordpress downloads dropped by about 34% in 2011, the CMS remains the most popular with almost 645,000 downloads.


Third-party support is considered in the study because it indicates popularity of the CMS. Of the top 20 systems in the study, Movable Type, e107, SilverStripe, OpenCms, CMSMadeSimple and Tiki showed signs of a decreased support trend.

In 2011, 23 books on Wordpress, 22 Drupal titles, and 13 Joomla books were released, whereas no new book titles rolled out for TYPO3, OpenCms or Textpattern.

Interestingly, when the study looks at total bookmarking activity for the project sites on Delicious, Digg and Reddit, Drupal came out on top in the social bookmarking space, with Wordpress and Joomla following. Joomla had 66% of the share of voice on Facebook, however, with Drupal and Wordpress following behind at 14% and 8%, respectively.


Brand sentiment is where Concrete5 shines in 2011. Wordpress and Drupal followed behind, but Joomla fell down the list with only 50% of respondents viewing the CMS in a positive light.


Concrete5 also did well in the conversion rate category, with more than 60% of users converting after evaluating the system. Only Wordpress has a higher conversion rate, according to the study. Concrete5 came out on top when it came to keeping users (brand loyalty), too.

In the .NET arena, DotNetNuke is the market leader, but Umbraco is closing the gap. Three Java-based systems made the top 20 list, with Alfresco and Liferay strong in some metrics, but OpenCms lagged behind in many categories.

With its increase in downloads, growing third-party support, search engine visibility, project site popularity, mindshare and reputation, Concrete5 stood out as the project to watch in 2012.