Scope3 rebrands as Apostra, pivots to agentic buying

Brian O'Kelley and Anne Coghlan have renamed Scope3 to Apostra and repositioned it as a marketplace for agent-to-agent media transactions on the open-source Ad Context Protocol, where a buyer's agent states intent and a seller's agent answers with audience and opportunity. O'Kelley: "Imagine if every podcast, every sub-reddit, influencer video we could have an agent figuring out exactly where and how our brand should show up or if it should show up at all."