Last weekend, digital agency water&stone, released their 2011 Open Source CMS Market Share Report. I consider this report one of the few non-bias and detailed surveys that come across my desk each year. The report isn't perfect, but the report does help give a good snapshot on the state of who's who in the world of open source content management systems.
You are most definitely going to want to take a look at the details in the report. The findings in this year’s report were based on a survey of more than 2,500 CMS users and additional research into a wide variety of measures of market share and brand strength. I'm still combing through the survey and taking note of the interesting individual nuggets of information that can be found in the results of the survey.
Not surprisingly, the report confirms the ranking position of open source's three most dominate Web content management systems in the market. The press release itself summarizes the results this way:
PHP-based systems WordPress, Joomla! and Drupal continue to dominate the web content management space. But, while the Big Three remain unchanged from last year, the Report concludes that WordPress retains a clear lead in the face of decreasing competition from Joomla!.
The decreasing competition from Joomla! can be seen most noticeably in the decrease of installations reported by the survey respondents in 2011 compared to 2010. The survey does note that this dramatic drop is likely due to the Joomla! community aggressively promoting the survey last year. This year, the promotion efforts were not coordinated and less influential. I only point this out because this is an example of where the report isn't "perfect" via inconsistencies in the yearly survey sample introducing a margin of error in the trend comparisons.