All organization admins can add people to the organization. To do so, you need to open the admin panel at fleep.io/admin and open the Members view.
Here, click on the Add members button.
In the popup that appears, type the names of your contacts, their Fleep username or email addresses and hit Add. Now, they have been invited to join the organization.
Once they accept the invite, they will be shown as an Activated member of your organization, and will also be added to your organization's subscription of Fleep for Business.