Sub-accounts are used to give departments of an organization their own separate accounts without having to open stand-alone accounts. Examples are universities, municipalities, franchises and any organization with multiple departments.
Benefits of using sub-accounts
Sub-accounts can be operated independently without data sharing of any kind
Individual users can be assigned to access only a single sub-account
Admin users can access all sub-accounts
Templates may be shared across sub-accounts to help with branding
Cheaper than opening multiple stand-alone accounts
With the exception of template sharing (which is optional) and email credits (which applies only if you're on the Pay-as-you-go plan) there is no data sharing of any kind between sub-accounts: messages, stats, contact lists, subscriptions, account settings, etc. in every sub-accounts are independent of other sub-accounts.
If the same contact exists in more than one sub-account and they unsubscribe in one of the accounts they will remain subscribed in all other accounts.
Each sub-account can have their own users who can only access their designated sub-account. Administrators can access all sub-accounts.
Read more about user roles and permissions.
For the Monthly Subscription Plan the total number of contacts across all sub-accounts is used to determine the number of active contacts for billing.
For the Pay As You Go Plan sub-accounts share a common pool of email credits that the primary account purchases. Each sub-account draws from this pool of credits as they send emails.
For both payment plans the primary account is billed and cost allocation between sub-accounts is done internally.
Number of sub-accounts under one main account
You can maintain unlimited sub-accounts.
Creating a new subaccount
Click the Subaccounts link in the navigation in the top right corner:
Only administrators have access to create new sub-accounts.
If you aren't an administrator, the users list page will show you the name and contact details of your administrator(s). Contact them to have them grant you additional permissions.