Subdomain
A subdomain is an extension of your current domain. It's created for free from cPanel without needing to register anything new.
blog.yourcompany.comstore.yourcompany.comsupport.yourcompany.comWhen to use it:
- Separate sections of your same project
- Development or testing environment (dev.yourcompany.com)
- Internal company applications
- Campaign landing pages
Addon Domain
An addon domain is a completely different domain that you can host on the same cPanel account. It requires the domain to be registered (it has a cost).
anotherbusiness.comdifferentproject.netWhen to use it:
- Completely different projects
- Sites for different clients
- Separate brands under the same account
Quick Comparison
| Feature | Subdomain | Addon Domain |
|---|---|---|
| Cost | ✅ Free | ???? Domain cost |
| Appearance | blog.yourdomain.com | otherdomain.com |
| Independent SEO | Partial | ✅ Total |