Article by Jerry Low
Geek dad, SEO data junkie, investor, and founder of Web Hosting Secret Revealed. Jerry has been building Internet assets and making money online since 2004. He loves mindless doodling and trying new food.
An add-on domain is a new domain name that’s added on top of your main domain in your hosting account. An add-on domain do not have its own control panel page (cPanel for example); rather, it’s squatting below the main domain where a sub directory is added in your main hosting root directory (normally in ‘public_html’ folder). The add-on domain will have it’s own index files (the homepage of the add-on domain) and cgi bin folder.
An add-on domain shouldn’t be confused with subdomain as they are different things. An add-on domain has its own stand alone URL, for example www.webhostingsecretrevealed.com; while a subdomain URL are linked with its ‘mother’; mail.webhostingsecretrevealed.com for example is a sub domain.
The biggest differences that separate add-on domain with subdomain is that subdomain is free of charge, while adding an add-on domain requires you to register your unique domain name via a domain registrar – which would cost your an annual fees.
The biggest benefits of having an add-on domain is that it helps saving hosting cost.
As the add-on domain shares all the resources on your web hosting (like bandwidth, disk space); it’s much cheaper to maintain multiple websites on the same web host. In the same time, the add-on domain has almost the same features that you get from a major domain in your hosting account. The add-on domain will have its own FTP manager, site stats, as well as cgi bin features.