Joomla! is a free and open-source content management system (CMS) for publishing web content, developed by Open Source Matters, Inc. It is built on a model–view–controller web application framework that can be used independently of the CMS.
Joomla! is written in PHP, uses object-oriented programming (OOP) techniques (since version 1.5) and software design patterns, stores data in a MySQL, MS SQL (since version 2.5), or PostgreSQL (since version 3.0) database, and includes features such as page caching, RSS feeds, printable versions of pages, news flashes, blogs, search, and support for language internationalization.
As of November 2016, Joomla! has been downloaded over 88 million times. Over 8,000 free and commercial extensions are available from the official Joomla! Extensions Directory, and more are available from other sources. It is estimated to be the second most used content management system on the Internet, after WordPress.
WordPress is a free and open-source content management system (CMS) based on PHP and MySQL. To function, WordPress has to be installed on a web server, which would either be part of an Internet hosting service or a network host in its own right. An example of the first scenario may be a service like WordPress.com, and the second case could be a computer running the software package WordPress.org. A local computer may be used for single-user testing and learning purposes. Features include a plugin architecture and a template system. WordPress was used by more than 29.4% of the top 10 million websites as of January 2018.WordPress is reportedly the most popular website management or blogging system in use on the Web, supporting more than 60 million websites. WordPress has also been used for other application domains such as pervasive display systems (PDS).
WordPress was released on May 27, 2003, by its founders, Matt Mullenweg and Mike Little, as a fork of b2/cafelog. WordPress is released under the GPLv2 (or later) license.