Plesk basically has the following domain option:
- Plesk 10 Domains
- Plesk 30 Domains
- Plesk 100 Domains
- Plesk 300 Domains
- Plesk Unlimited Domains
Prices increase with more no. of licenses. If you need to host more number of domains, you will definitely require licenses to be installed on the dedicated servers.
Regards,
Shane Phillips