Do you need a Missouri Marketing Consultant? LocalSpark has found the top internet marketing agencies in the Missouri area. In the current aggressive marketplace, it’s important to find an expert marketing consultant or agency if your company wants to be competitive. Marketing consultants help their clients with web design, print materials, SEO, logos, branding, and various other projects that promote your company’s reputation and image. Below, we’ve gathered up a list of the best Marketing Consultants in Missouri.