A single Blesta license permits you to install one copy of the Blesta on one domain, e.g., yourdomain.com. Beyond that, Blesta does not limit you in
clients
invoices
connected servers (cPanel, Direct Admin, etc.)
support tickets
staff / workers
For your setup, a single license will work for yourdomain.com which means 1 domain and 1 server. If you run multiple companies, company-a.com and company-b.com as an example, and each want to have Blesta on their own domain, then you need to purchase additional domain license called “Multi-Company” license addons.
Full information here: https://docs.blesta.com/display/support/End+User+License+Agreement
Note: You should reach out to Blesta Sales to get an official answer.
-Adam
