Entities Organizations SUM Digital
Organization · Digital Marketing
Last updated 2026-05-12
ConfirmedSUM Digital
SUM Digital is a senior-led digital marketing agency specializing in paid media for 7-9 figure ecommerce brands. Founded in 2014, the agency focuses on Meta, Google, and TikTok advertising with a senior-only team, full transparency, and month-to-month contracts. They emphasize real business metrics like ROAS, MER, and contribution margin over vanity metrics, and offer integrated media buying and creative production services.
Not to be confused with Sumo Digital (UK game studio acquired by Tencent) or SUM Digital (Netherlands-based B2B marketing firm); this is the San Francisco-based ecommerce advertising agency founded in 2014 by Terry Whalen and Joey Muller.
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