Marketers pioneering agentic AI are focusing on three distinct agent classes: Agents for marketers, agents for customers, and most disruptively, agents of customers. Each reconfigures the marketer’s role, and in some cases, forces a rethink of what brand means in a world where the first audience is artificial. But it's the third domain where the real brand shift lands. Agents of customers are tools that will judge brand content before a human ever sees it. For marketers terrified by the implications, martech expert Scott Brinker has some advice: Chill, you have been doing this for years with search, you just didn't notice. But don't lag behind. This year's Martech for 2026 survey by Brinker and Frans Riemersma reveals increasing agent deployment, especially among more tech savvy organisations. As Brinker puts it, marketers used to optimise for a single agent. Now they face a council of machines, each one acting on behalf of someone else. The question isn’t whether marketers are ready. It’s whether their brands will even make the cut.