The World’s Largest Snapchat Filter Design Agency. Geofilter Studio is an official Snapchat partner that specializes in custom filters. We were the first Snapchat Geofilter design agency in the world, and are currently the largest. Our clientele range from individuals to Fortune 500 companies, high profile celebrities, sports organizations and professional athletes, governments, international restaurants, hotel chains, universities and much more. We offer both fully custom filters designed from scratch, and the largest collection of customizable pre-made templates.