Wappalyzer, one of our other projects in cooperation with its original founder Elbert F, is a browser add-on that uncovers the technologies used on websites. It detects CMS and e-commerce systems, JavaScript frameworks, analytics tools and more.

We have compiled the global OpenSource CMS information provided by the browser add-on on this page to give you an idea of the Top 20 Open Source CMS tools out there and their current market share. There are currently over 20,000 people that have the add-on installed and are reporting this data. Keep in mind that the statistics are of course only a snapshot of the past 30 days and only cover roughly 1% of the entire web.

#	Application	Websites using this	Pageviews
1	WordPress	919,639	56,586,804
2	Joomla	275,856	9,503,243
3	Drupal	139,104	14,606,316
4	TYPO3	40,271	1,938,305
5	MODx	6,476	132,183
6	DotNetNuke	5,042	170,478
7	Movable Type	4,573	218,523
8	Liferay	3,732	297,534
9	Pligg	3,447	531,683
10	SilverStripe	2,724	107,227
11	Concrete5	2,283	149,627
12	SPIP	2,277	54,640
13	Umbraco	2,002	26,696
14	eZ Publish	1,763	81,609
15	Plone	1,711	79,697
16	Ametys	1,487	170,072
17	XOOPS	1,383	62,059
18	e107	1,184	40,511
19	CMS Made Simple	1,169	24,457
20	Contenido	1,037	18,773

You can help Wappalyzer by downloading the browser add-on and start reporting CMS statistics, too.