Start with the work. A brand design agency should be able to show you featured work across a range of industries, from trades to innovation-led start-ups, not one house style repeated, and explain the thinking behind the branding work, because effective branding needs strategic depth, not just something that looks good. Then look at how they work. A good creative agency asks a lot of questions before it draws anything, because a deep understanding of your business, your market and your competitors is what the design is built on, and that expertise shows in the questions they ask.
Check the fit as well. Some agencies are set up for enterprise and their professional services and pricing reflect that. Others are two people and a laptop. We sit in the middle on purpose: a small Brisbane team with the expertise to handle a full rebrand, and the habit of going the extra mile because our name is on the work too. The right brand design agency for you is the one whose process you can follow, whose work you would be proud to put your name to, and who still picks up the phone after launch, and that is the standard we hold ourselves to.