Are they vendor agnostic?
Consultants are in a unique field. For technology consultants, there are no certifications required to establish expertise or credibility.
Anyone can claim to be a consultant.
In fact, many vendors have employees who have “consultant” somewhere in their job title, and they may actually provide advice to customers.
And they may be vendor agnostic—among the products that they provide. But they are certainly not going to recommend a product outside of their portfolio.
Do you want your choices to be limited?