Basic terms defined
Joomla.com is the newest Joomla! service that allows you to build and maintain a completely free website. The site building software you will be using as part of the service is a slightly modified version of Joomla CMS. The website you create as part of the service will be hosted for free on the special Joomla.com hosting plaform for an unlimited amount of time.
Joomla! CMS is a free open source software developed and maintained for almost 10 years by a community of dedicated volunteers. Its full version is already used by millions of people for creating and maintaining self-hosted websites.
Joomla.org is the website of the great community behind Joomla! CMS. On this website you can download the full version of Joomla! CMS, find a detailed documentation on how to use it, get help from fellow users in the community support forums, read the project news, learn about the community events and even get involved in this amazing project.
Differences between Joomla.com and a self hosted Joomla!
|Joomla.com Site||Self-Hosted Joomla Site|
|Hosting:||Free part of the service||Responsibility of the user|
|Domain:||Free subdomain at joomla.com||Responsibility of the user|
|Joomla install:||Pre-installed||Performed by the user|
|Joomla updates:||Automatic||Responsibility of by the user|
|Languages:||All 50+ languaged pre-installed||User installs languages as needed|
|Core Joomla CMS functionality:||Not limited||Not limited|
|Extensions:||5 pre-installed Joomla.com extensions||No limitations on what user can install|
|Templates:||Limited to a number of pre-selected Joomla.com templates||No limitations on what templates user can install|
|Template files editing:||Not possible||Possible|
|Sign up for Joomla.com||Try self-hosted Joomla demo|
See full list of the differences between a Joomla.com admin and a self-hosted Joomla admin here.