Open CMS

OpenCms from Alkacon Software, the open source content management system (CMS) based on Java and XML for public internet website, extranet or intranet.

Market Share By Site Popularity

The market share for Open CMS decreased by 0.171 percentage points for Most Popular Sites, more than any other segment during the same period of time.

Alexa RankCMS RankMarket ShareMarket Share Change
Most Popular Sites < 1,000n/an/a -100%
Very Popular Sites < 10,000#790.266% -18.4%
Popular Sites < 100,000#930.113% -10.32%
Less Popular Sites < 1,000,000#1240.039% 8.33%
All Sites#1750.016% -20%

Market Share History

This chart shows the history of detected websites using Open CMS.  
In the last 6 months, market share has decreased 20.00% from 0.020% to 0.016%

CMS Versions: Major

Percentage of detected CMS versions

Major VersionPercent
Version 939.22%
Version 1121.57%
Version 1039.22%

CMS Versions: Minor

Minor VersionPercent
Version 9.539.22%
Version 11.021.57%
Version 10.539.22%

Top Level Domains

Websites using Open CMS were found on 69 top level domains

Top Level DomainsPercent
Germany (.de)26.03%
Commercial (.com)18.68%
Spain (.es)12.74%
Austria (.at)6.911%
Italy (.it)6.263%
Organization (.org)3.240%
Australia (.au)1.836%
Czech Republic (.cz)1.728%
Russia (.ru)1.728%
Brazil (.br)1.512%
European Union (.eu)1.188%
Network (.net)1.188%
Switzerland (.ch)0.972%
Taiwan (Republic of China) (.tw)0.864%
Greece (.gr)0.864%
Chile (.cl)0.756%
China (.cn)0.648%
Mexico (.mx)0.540%
India (.in)0.540%
Canada (.ca)0.540%
France (.fr)0.540%
Belarus (.by)0.540%
Japan (.jp)0.540%
Ireland (.ie)0.432%
Portugal (.pt)0.432%
Info (.info)0.432%
Belgium (.be)0.432%
Denmark (.dk)0.432%
Romania (.ro)0.432%
Norway (.no)0.324%
New Zealand (.nz)0.324%
Liechtenstein (.li)0.324%
Coop (.coop)0.324%
Vietnam (.vn)0.324%
Hong Kong (.hk)0.324%
Netherlands (.nl)0.324%
Poland (.pl)0.216%
Asia (.asia)0.216%
United Kingdom (.uk)0.216%
Columbia (.co)0.216%
United Arab Emirates (.ae)0.216%
Slovakia (.sk)0.216%
Malaysia (.my)0.216%
Cat (.cat)0.216%
Education (.edu)0.216%
Government (.gov)0.216%
Argentina (.ar)0.216%
Kazakhstan (.kz)0.108%
Laos (.la)0.108%
South Africa (.za)0.108%
Peru (.pe)0.108% (
Bulgaria (.bg)0.108%
British Indian Ocean Territory (.io)0.108%
Ukraine (.ua)0.108%
Cambodia (.kh)0.108%
Tuvalu (.tv)0.108%
Uganda (.ug)0.108%
United States of America (.us)0.108%
Kenya (.ke)0.108%
Hungary (.hu)0.108%
Sweden (.se)0.108%
Guinea (.gn)0.108%
Philippines (.ph)0.108%
Indonesia (.id)0.108%
Niue (.nu)0.108%
Thailand (.th)0.108%
Singapore (.sg)0.108%
Burma (Union of Myanmar) (.mm)0.108%

Popular Sites Using Open CMS

We detected the following sites were using Open CMS

How We Detect Installations of Open CMS


A CMS will sometimes include a meta tag within the html of each page. This is usually a "generator" tag like <meta name="generator" content="What CMS" /> but could also be "application-name", "Powered-By" or anyting else the CMS creators decide to use.


HTTP headers can provide some of the best clues about a site's CMS. The values of set-cookie and x-powered-by headers are the most common and easiest to find.


If a CMS doesn't have meta tags, it will often have other uniquely identifiable html markup. This can range from unique html comments, ids or classes.


In addition to detecting the CMS, in some cases we are able to accurately detect which version of the CMS is being used.

Let us know if you know how we can better detect Open CMS

Compare Open CMS

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