wordpress.com VS wordpress.org

The biggest difference between wordpress.com and wordpress.org is who is hosting your site. On wordpress.org you host your own site by downloading your own software. It's completely free, it's more on your own. Wordpress.com is easy to set up, as you don't have to set up a hosting account; however, in the free version of wordpress.com you don't have very much freedom to customize, unless you pay for upgrades. When using wordpress.org you can use plugins and any theme you want, but you have to pay for your own hosting, setup wordpress yourself, and you have more responsibility because you are hosting your website, not someone else.