There are 4 types of member roles within a company's account. You can manage members by clicking on your 'My Account', 'Manage Members'. There is no limit to the number of users within each role.
The rights for each role is defined as follows: -
1. View payments - View payments made by all company members
2. Create payments - View payments by all company members and create payments
3. Approve payments - View payments by all company members, create and approve payments
4. Admin - All of the above, and manage roles of the team
The first person from a company who signs up for a CardUp account will be an Admin by default.