Publicis just told us where 87% of its revenue comes from. Small agencies should pay attention to the other 13%.

In ecology, there's a concept called a keystone species — an organism whose impact on its ecosystem is wildly out of proportion to how much of it there actually is. Pull the sea otter out of a kelp forest and the whole thing doesn't just wobble; it collapses. Urchins boom, kelp vanishes, fish leave. The otter was never the biggest or most numerous thing in that system. It was just the thing holding the structure together.

Something similar seems to be happening inside the big advertising holding companies right now, and Publicis just handed us the numbers to prove it.

In its first-half 2026 results, Publicis Groupe reported that 87% of its net revenue now comes from AI-powered marketing services — media, data, creative, commerce, CRM and production, all running through AI-driven systems. That part of the business grew 6.5% in the second quarter, well ahead of the group's overall 4.8% growth. Connected Media, its data-and-media arm, was the strongest performer. Meanwhile, Publicis' technology consulting division — the part of the business built around big, standalone transformation projects — shrank, as clients pulled back on large-scale, capital-intensive tech spend. Publicis has been backing this shift with acquisitions too, picking up a content intelligence platform, a sports and culture marketing agency, and announcing a deal for a major data collaboration and identity platform.

Read those two numbers side by side and the story isn't really "AI is big at Publicis." It's that AI has stopped being a line item and become the load-bearing structure of the business. That's worth sitting with if you run, or work inside, a much smaller agency.

A few things stood out to us, from where we sit training small creative and marketing teams to actually use this stuff well.

87% isn't a department, it's the business. When AI-driven work accounts for that much of revenue, it's not a specialty offering sitting next to "traditional" services anymore — it is the service. Plenty of smaller agencies still treat AI as a single hire, a tool subscription, or a pitch-deck slide. Publicis' numbers are a preview of where the whole market is heading: AI fluency stops being a differentiator and starts being the baseline cost of staying in business.

The fastest growth came from the least glamorous part of the work. Connected Media — data, targeting, measurement — outgrew Intelligent Creativity, the more visibly "creative" AI division. That's an easy thing to miss if you assume AI's value to an agency is mostly about generating content faster. The bigger compounding advantage seems to be in the unglamorous layer underneath: knowing your audience, measuring what's working, and feeding that back into the next campaign. Small agencies chasing AI often start with content generation because it's the most visible use case. The data suggests the durable advantage is elsewhere.

Where Publicis pulled back is as instructive as where it leaned in. The technology consulting business — big, discrete, expensive transformation projects — declined. Clients didn't want another six-month engagement to "get AI-ready." They wanted AI capability already built into the services they were buying. For small agencies, that's a useful signal about how to position AI work: not as a separate consulting product to sell clients, but as something woven into the deliverables you already provide.

The acquisitions show what "AI-powered" actually requires. LiveRamp brings identity and data infrastructure. Adge.AI brings content intelligence. 160over90 brings deep, specific cultural and sports expertise. None of those alone is "an AI tool." Together, they're a combination of data access, domain knowledge, and technical capability — which is a good reminder that building real AI capability isn't a procurement decision. It's a training and integration problem, across data, judgment, and craft, not just a line in the software budget.

The keystone framing isn't meant to be alarming. It's just a reminder that when one capability becomes this central to how the biggest players in your industry operate, "we'll get to AI eventually" stops being a viable strategy — for a holding company with billions in resources, and just as much for a ten-person shop.

If you're trying to figure out how to build that capability into your team's actual day-to-day work — not as a bolt-on tool, but the way Publicis has built it into the core of the business — that's exactly the kind of work we help agencies do.