Phil Duffield

Phil Duffield is a product leader at Kevel (formerly Adzerk), a company that provides ad serving infrastructure APIs enabling brands, retailers, and publishers to build fully custom ad platforms without relying on walled garden solutions from Google, Amazon, or Meta. As VP of Product, he shapes the strategic direction of Kevel's API-first ad infrastructure, with a particular focus on retail media networks and first-party data monetization. His work sits at the intersection of ad tech engineering and business strategy, helping organizations architect ad experiences that they own and control. Duffield has become a recognized thought leader in the retail media and first-party advertising space, frequently contributing perspectives on how brands can build sustainable, privacy-compliant ad infrastructure as third-party cookies deprecate and signal loss accelerates across the industry. He advocates for the model of 'ad infrastructure as a service,' where companies leverage composable APIs rather than black-box ad platforms, giving them greater transparency, flexibility, and data ownership. His career has been centered on product management within the AdTech and SaaS sectors, with Kevel representing his most prominent platform for industry influence. He is associated with Kevel's broader mission to democratize ad serving technology and reduce the industry's dependence on a handful of dominant ad tech players.

• Led product strategy at Kevel during the company's growth as a leading API-based ad infrastructure provider for retail media and custom ad platforms
• Established Kevel's thought leadership positioning around first-party ad infrastructure as an alternative to walled garden ad platforms