Thank you for posting this question! To answer it, at the moment the option we have is the Sub-account system for agencies.
Here's how it works: You'll have your main Admin-Account (your account), and for each of your clients, there will be individual Sub-Accounts.
One significant advantage of the Sub-account system is that all your sub-accounts enjoy a 20% discount on ALL our plans.
Here you can learn more about our Sub-account system for agencies.