Bryan Wiener — Co-Founder & CEO at 37Arc

Bryan Wiener, a well-known figure in the AdTech and marketing technology space, has co-founded and taken the role of CEO at 37Arc, a new venture focused on AI-driven solutions for Chief Marketing Officers (CMOs). Wiener brings significant industry credibility to the role, having previously served as CEO of Comscore and before that as Executive Chairman of 360i, a prominent digital agency. The formation of 37Arc signals a deliberate move to address the growing complexity CMOs face in navigating AI adoption, data strategy, and marketing effectiveness in an increasingly fragmented media landscape. The company appears to be co-founded alongside Ann Hofstetter, another experienced marketing and media executive, suggesting a leadership team with complementary expertise spanning agency, measurement, and brand-side perspectives. The venture is positioned at the intersection of AI consulting, marketing strategy, and technology enablement — a space that has seen surging demand as brands scramble to operationalize generative AI and advanced analytics within their marketing organizations. 37Arc's emergence reflects a broader trend of senior AdTech and agency executives launching boutique advisory or technology firms aimed at helping brands cut through the noise of AI hype and build practical, scalable marketing capabilities. The timing aligns with a period of significant C-suite uncertainty around AI investment priorities, making a credentialed, CMO-focused advisory and technology firm a potentially well-positioned offering in the current market.

The launch of 37Arc by Bryan Wiener and Ann Hofstetter adds a notable new player to the growing ecosystem of AI-focused marketing consultancies and technology firms targeting enterprise CMOs. Wiener's background leading Comscore — a critical measurement and audience intelligence company — gives 37Arc immediate credibility in data-driven marketing circles, potentially positioning it as a trusted advisor to brands navigating measurement fragmentation, identity resolution challenges, and AI integration. This could place 37Arc in competitive proximity to firms like McKinsey's marketing practice, Accenture Song, and boutique AI marketing consultancies such as Persado or Pattern89 alumni ventures. The move also underscores a continuing talent migration from large AdTech platforms and measurement companies toward entrepreneurial ventures, reflecting both the opportunity and the disruption that AI is creating across the industry. For the broader AdTech ecosystem, 37Arc's focus on CMO enablement could influence how brands evaluate and procure AdTech solutions, potentially acting as a kingmaker or advisor in vendor selection processes. If the firm gains traction, it could also attract investment from strategic AdTech players seeking a channel into brand-side decision-making.