Sarah Hofstetter

Co-Founder at 37Arc

Co-founding and building 37Arc

OperatorNew York, New York, United States20+ years in industry

Last updated May 31, 2026 by the ATDb Editorial Team · Connections updated May 31, 2026

Bio

Sarah Hofstetter is Co-Founder at 37Arc, bringing to the venture the deep expertise she built over more than a decade at 360i, where she rose from Chief Marketing Officer to President to CEO between 2008 and 2019. During her tenure at 360i she helped establish the agency as a benchmark for data-driven, culturally resonant digital marketing. She is now channeling that experience into building 37Arc.

Previous Roles

CEO

360i (2014-2019)

President

360i (2011-2014)

Chief Marketing Officer

360i (2008-2011)

Expertise

eCommerce AnalyticsDigital Shelf OptimizationRetail MediaDigital Brand StrategySocial Media MarketingAgency LeadershipProgrammatic AdvertisingConsumer Packaged Goods Marketing

Education

BA, University of Maryland

Notable Achievements

Led 360i as CEO during the agency's most celebrated creative and growth period, including the iconic Oreo Super Bowl real-time marketing moment
Grew Profitero's market presence and positioned the company as a leading eCommerce analytics platform for global CPG brands
Named to Advertising Age's Women to Watch list
Championed diversity and inclusion initiatives across the advertising industry through board service and public advocacy

Awards

Advertising Age Women to WatchAdweek Most Powerful Women in Sports and Entertainment (related recognition)4A's various industry recognition

Speaking Topics

eCommerce transformation and digital shelf strategyThe future of retail media and brand marketingDiversity and inclusion in advertisingAgency transformation and digital-first leadershipReal-time marketing and social media strategyBrand building in the age of data and analytics

Publications

Contributor and quoted expert in Ad Age, Adweek, and The Wall Street Journal on topics of digital marketing and eCommerce

Board Memberships

Ad Council4A's (American Association of Advertising Agencies)

Connections