All organization admins can invite people to the organization. To do so, you need to open the admin panel at fleep.io/admin and open the Accounts view. Here, click on the Add accounts button.
In the popup that appears, you can search for existing Fleep users by their name, Fleep username or email addresses. To invite people who are not Fleep users yet, use their email address. Then click on Add. Now, they have been invited to join the organization — you can also see them as Invited members in the list of User accounts.
Once they accept the invite, they will be shown as a regular member of your organization, and will also be added to your organization's subscription of Fleep for Business.