What Should You Look for in a Professional Logo Design Agency?

I’m currently researching a logo design agency to help create a strong and professional brand identity.

With so many agencies offering branding and logo services, it can be difficult to understand what separates a good logo design agency from an average one. Some focus heavily on creativity, while others prioritize strategy, brand research, or fast turnaround times.

For those who have worked with a logo design agency, what factors mattered most in your decision? Did you focus on portfolio quality, communication, pricing, or revision policies?

I’d also like to know if the agency you worked with truly understood your brand vision and delivered a logo that matched your expectations.

Any recommendations or personal experiences would be greatly appreciated.