What Sets The Best Presentation Design Agencies In The USA Apart?

I've been researching the best presentation design agencies in the USA and noticed that each agency offers a different mix of services, from investor pitch decks and sales presentations to corporate reports and marketing presentations. Some agencies are known for exceptional visual design, while others stand out because of their storytelling, strategic messaging, or industry expertise. I'm interested in hearing different perspectives on this topic. In your opinion, what qualities define a top presentation design agency, and what factors should businesses consider before choosing one?