Programmatic advertising has spent two decades automating how ad slots get bought. What has stayed stubbornly manual is the step before that: figuring out which publisher audience is actually worth buying. PubMatic and Optable are now closing that gap, wiring AI agents directly into the sell side so publisher first-party data can be packaged, priced and sold without a human touching a deal sheet.
From Manual Curation to Autonomous Discovery
PubMatic’s AgenticOS platform, built for what the company calls agent-to-agent advertising, now runs an integration with Optable’s Audience Agent that lets buy-side and sell-side agents negotiate directly. Optable CEO Vlad Stesin has described the goal as letting buyers and sellers “collaborate securely, uncover new audience value, and activate it faster without compromising privacy,” with the underlying publisher data never changing hands. Optable’s agent packages a publisher’s identity, contextual and audience signals into a custom segment matched to a campaign brief; PubMatic’s buyer-side agent ingests that segment and can move straight to real-time bidding through PubMatic Activate.
That matters because audience curation has historically been one of the most labor-intensive parts of a publisher’s ad operation. Someone on the sales or ad-ops team has to know what data exists, translate it into a sellable package, and pitch it to the right buyer. PubMatic CRO Americas Kyle Dozeman framed the shift as agents doing that legwork: identifying “high-value, custom audiences” and moving them to activation without the manual handoff.
Publishers Are Already Testing the Workflow
The integration is no longer theoretical. PubMatic has reported more than 1,000 direct-sold agentic deals and roughly 30 live end-to-end agentic programmatic campaigns running globally, spanning the United States, France, the Netherlands, Australia and India. Roughly half of those programmatic campaigns are powered by the Optable integration specifically.
Two publisher networks illustrate what that looks like in practice. Mediavine, whose network spans more than 18,000 publishers, is using the workflow to surface first-party audiences that previously sat unused because packaging them required manual sales work. “Unlock a data asset that’s been there but untapped,” is how Mediavine VP Charlie Morris has described the opportunity, adding that the agent-driven approach makes audience discoverability possible in real time rather than through a sales cycle.
Livewire, a gaming-focused ad network, is testing the same PubMatic-Optable pipeline to activate its Gamer.ID identity framework, which itself runs on Optable’s data collaboration and clean-room infrastructure. Gamer.ID resolves gaming audiences through Livewire’s proprietary Gamer.Graph engine, and the PubMatic integration gives that resolved audience a direct path into programmatic buys across mobile, PC, console and connected TV inventory. It is the sell-side counterpart to a trend already visible on the publisher side, where networks are building ad inventory specifically for AI agents rather than treating agentic buyers as an afterthought.
Early Results on the Buy Side
PubMatic has pointed to campaign-level results from agency partner Butler/Till as evidence the model works beyond pilot scale: a fivefold reduction in buy-side fees, 40% more impressions delivered, and a 30% lower effective CPM on one campaign. A national online-video and display campaign run through the platform hit 107% of its impression target and 105% of its video-completion-rate target. PubMatic CEO Rajeev Goel has tied the pace of adoption to competitive pressure, saying “the companies moving fastest are the ones with the agility and vision to make bold new moves.”
The agentic campaigns are not confined to Optable’s data pipeline. PubMatic has run the same AgenticOS framework with agency partners including Brkthru, which manages media for more than 1,000 brands, along with Butler/Till, MiQ and Untapped Growth in the US, Amnet in France and Abovo Maxlead in the Netherlands. Across those campaigns, PubMatic says the underlying premium inventory spans more than 2,000 publishers and 100,000 sites and apps, which is the scale that makes automated audience discovery worth building in the first place: no sales team can manually curate segments across that many properties.
What It Means for the Marketing Leader
For brands and agencies, the practical shift is where audience strategy now happens. If a publisher’s first-party data can be discovered and activated by an agent without a sales conversation, the advantage moves toward whichever buy side has the cleanest campaign briefs and the fastest agent integration, not necessarily the biggest media budget. Marketing leaders evaluating DSP and SSP partners should start asking a new diligence question: does this platform’s agent layer actually reach into publisher first-party data, or does it stop at the auction?
There is also a data-governance angle. Because Optable’s model keeps underlying publisher data inside the publisher’s environment and only exposes derived segments, it sidesteps some of the direct data-sharing risk that has made privacy and legal teams wary of first-party data deals in the past. That is likely to matter more as more publisher networks look to monetize data they have been sitting on without a compliant path to sell it.
What to Watch Next
The open question is scale beyond early adopters. Thirty live campaigns and two publisher networks in testing is a real signal, not yet a market standard. It also sits alongside a parallel effort to govern how agents transact at all: the IAB Tech Lab’s AAMP framework, which recently added enterprise-grade rules for agentic advertising, gives buyers and sellers a shared standard to point to as more of these agent-to-agent pipelines go live. Marketing leaders should watch whether other major SSPs answer with their own agent-to-agent audience layers, and whether buyers start writing agent compatibility into their RFPs the way they once wrote in viewability or brand-safety requirements. The publishers that get their first-party data agent-ready first stand to capture demand before the rest of the market catches up.
Source: PubMatic Investor Relations
