Mathieu Gallienne

Mathieu Gallienne is best known as the co-founder and CEO of Assertive Yield, a publisher-focused AdTech platform that provides real-time yield optimization, traffic shaping, and revenue analytics tools. Under his leadership, Assertive Yield has become a recognized solution in the supply-side ecosystem, helping publishers maximize programmatic revenue through granular data insights and automated optimization capabilities that go beyond what traditional SSP dashboards offer. Gallienne has built his career at the intersection of publisher monetization and data-driven advertising technology. His work at Assertive Yield reflects a deep understanding of the challenges publishers face in a complex, multi-SSP, header bidding environment, and he has positioned the company as a neutral analytics and optimization layer that works across the publisher's entire stack. His approach emphasizes transparency and actionable intelligence for revenue operations teams. Through content, product development, and industry engagement, Gallienne has contributed to broader conversations around publisher empowerment, yield management best practices, and the evolving role of first-party data in programmatic monetization. He is regarded as a practitioner-operator who combines technical depth with a strong commercial perspective on the publisher monetization landscape.

Last updated Jul 22, 2026 by ATDb automated enrichment · Connections updated Jul 27, 2026