No, you will only be able to have either a Student Beans account or a Grad Beans account. However, you will be able to switch between the two.
For example, if you have completed your degree and sign up to Grad Beans, but decide to do a masters a couple of years later, you will be able to switch back to your Student Beans account if you wish.
Check out Grad Beans - https://www.studentbeans.com/gradbeans/uk/