Ask who pays them
Many consultancies earn commission from a fixed set of partner universities. That is not automatically wrong, but it means the shortlist you receive may be drawn from that set rather than from every university that fits you. Ask directly: which universities do you have commercial arrangements with, and does my shortlist come only from those?
AEC: AEC works across 15 countries and is not restricted to a partner list. Where a commercial relationship exists, you are told.

