Gumas is a full-service advertising agency based in San Francisco. They specialize in Challenger Brand Marketing®, helping companies maximize their marketing budgets. Their Challenger Brand Discovery Process gives firms unique brand essence and effective strategies. They focus on customer needs, design strategies, and create powerful websites that engage customers. In addition, they provide social media marketing services. Among the agency's key clients are the 49ers Foundation, By The Bay Health, and Unitus Community Credit Union.