The CMS with the highest usage in the world are all open-source. The big three open-source CMS, namely "Drupal", "Wordpress" and "Joomla!", combined make up a total of over 70% of the market share. Up until now, many businesses were concerned about open-source software, saying that "Security is a cause for concern." and that "It's unclear where the responsibility lies". However, with a larger number of achievements and use cases being made public, open-source CMS are being used by an increasing number of businesses as an efficient way to create and operate websites.