Index Exchange said on September 10, 2026 that a pilot integration now runs PMG's media buying inside the exchange itself, with Bedrock Platform's containerized DSP acting as the decisioning layer and the agency triggering it from its own operating system. Streaming TV is the first channel in scope.

In Short

An advertising agency called PMG has started buying television ads using software that sits inside the marketplace where the ads are sold, instead of software that lives on rented servers somewhere else and has to send messages back and forth. It matters because the round trip costs time, and buyers have long been forced to ignore most of the ad opportunities available to them simply because evaluating all of them was too expensive. The change means PMG can look at more streaming TV inventory, decide faster, and see more of what it is actually buying, though nothing in the announcement proves the outcomes are better yet.

What the pilot actually connects

Four companies appear in the arrangement, each occupying a different layer.

Index Exchange supplies the infrastructure. Index Cloud, the company's own data center environment, hosts the code that makes buying decisions. Bedrock Platform, headquartered in London, supplies the bidding engine: a containerized demand-side platform that runs co-located with the exchange rather than calling out to Amazon Web Services, Google Cloud Platform or Microsoft Azure. PMG supplies the demand and the interface. According to Index Exchange, the agency activates the DSP directly from Alli Buyer Cloud, a component of Alli, the proprietary operating system PMG built in house. Subjective, which describes itself as a provider of agentic data and curation infrastructure for connected television, is named as the pilot's initial curation partner, feeding content and audience signals into each buying decision at bid time.

The sequencing matters. Premium streaming TV supply comes first. Mobile app and display inventory are described as following later, without a date attached to either.

Index Exchange framed the design intent in architectural terms, stating that the integration collapses the historical structure of programmatic by operating decisioning at the edge, inside the exchange, rather than as a separate destination every impression must travel to. The company characterized the result as sell-side decisioning in practice, with buying intelligence applied at the moment and location an impression becomes available.

Why co-location changes the arithmetic

The constraint the arrangement targets is not an algorithmic one. It is a cost problem that turns into a coverage problem.

In conventional programmatic buying, an ad opportunity fires on a device, a bid request travels across the public internet to a demand-side platform running on rented cloud compute, that platform decides whether to bid and at what price, and a response travels back. Every hop adds latency. Every request consumes compute that somebody pays for. Because the per-request cost is real and the volume is enormous, buyers cap how many requests they will accept, measured in queries per second. Exchanges then apply traffic shaping to decide which subset of opportunities to forward to each buyer and discard the rest.

The practical consequence is that a DSP evaluates a sampled slice of the market rather than the whole of it, and its optimization models learn from that slice. Moving the decisioning code inside the exchange removes the network trip and, with it, the economic reason to ration. Bedrock's head of engineering, Damian Naglak, made the underlying point earlier this year when the company's bidder first went live inside Index Cloud: the per-request cost that made throttling necessary falls close to zero once the code runs inside the cluster.

Index Exchange has previously reported a container execution window of under five milliseconds for that deployment. That figure has not been verified by an independent third party, and the September 10 statement does not update it, nor does it supply any comparable measurement for the PMG configuration specifically.

What the executives said

Three named company representatives are quoted in the material.

Mike Treon, head of CTV and video strategy at PMG, addressed the operational claim. "Alli Buyer Cloud is architected to turn intelligence into action. Operating at the supply edge means our agents can better evaluate every impression the moment it becomes available and act in real time based on our clients' objectives and policies, with no round trips, no signal loss, and full transparency into the quality of what we're buying," he said.

Shane Shevlin, co-founder and chief executive of Bedrock Platform, framed the significance around who gets access to the architecture. "Running on top of Index Cloud while using Bedrock Platform as the co-located buying engine lets a platform like PMG's Alli deploy its own decisioning at exchange scale, without the infrastructure tax that has historically concentrated that power in a handful of platforms," he said.

Michael Richardson, vice president of product at Index Exchange, put the emphasis on direction of travel. "Sell-side decisioning has the potential to reshape how the open internet transacts," he said. "PMG is making that future tangible, bringing the intelligence Alli is known for directly to the origin of the impression."

Shevlin's reference to concentration is the sharpest commercial argument in the set. Guideline data covering the first quarter of 2026 put Display & Video 360, The Trade Desk, Amazon DSP and Yahoo DSP at roughly 85% of global programmatic spend, with DV360 alone near 41%. Infrastructure cost is one of the reasons that concentration holds, and the co-location model is being sold as a way around it.

Scale without a bidder to operate

The number attached to the arrangement is 3,000. According to Index Exchange, Index Cloud provides access to more than 3,000 media owners globally, and PMG reaches that scale from the first day of the pilot without standing up and maintaining external bidder infrastructure of its own.

That structure is the part with the clearest read-across for other agencies. Building a bidder has historically been a capital commitment: servers, engineering headcount, ongoing cloud spend that scales with query volume rather than with media spend. An agency that wants proprietary decisioning logic has usually had to choose between building that stack or accepting the logic a commercial DSP provides. The containerized model proposes a third option, in which the agency supplies the decisioning and the exchange supplies everything underneath it.

Index Exchange said the arrangement marks the first time a major independent agency has activated the architecture directly through its own operating platform. Earlier deployments came from technology vendors rather than from the buy side proper.

The pattern has a documented history

The September 10 arrangement is the latest entry in a sequence that has been building for more than a year.

Zillow became the first brand advertiser to test containerized real-time bidding in August 2025, working with Chalice Custom Algorithms inside Index Exchange infrastructure, a configuration that surfaced site-level signals such as ad ratio per page and refresh rates that standard bid requests do not carry. In February 2026, Index Exchange published a case study recording a 75% reduction in cost per site visit for an apparel retailer using inPowered AI models deployed as containers inside the exchange.

Andrew Casale, Index Exchange chief executive, set out the thesis publicly at IAB's Annual Leadership Meeting on February 12, 2026, describing external infrastructure dependency as a cloud tax that consumes operating costs and holds performance back. Bedrock Platform then ran the first full containerized DSP bidder inside Index Cloud on April 21, 2026, with InterMedia Group, Bay Street Media and Navigator among the first testing partners.

Competitors moved in parallel. PubMatic opened its auction to partner models through Decision Fabric on June 1, 2026. Magnite set out two routes for outside models to run inside its auction on August 6, 2026, one server-to-server and one containerized. The standards layer followed the deployments rather than leading them: ARTF, the IAB Tech Lab framework defining container runtime behaviour inside an auction, names contributors from Index Exchange, Chalice, The Trade Desk and OpenX.

Not every sell-side operator accepts the premise. OpenX published a post on September 2, 2026 claiming three million queries per second processed on self-managed infrastructure, arguing that private infrastructure carries costs of its own rather than eliminating them. The dispute is about where the expense sits, not about whether it exists.

PMG's position in agentic buying

The agency is not new to this category, which is part of why the arrangement carries weight.

PMG was the first partner to pilot FreeWheel's Model Context Protocol server for premium video deals in March 2026, integrating it into Alli. It appeared on Pinterest's alpha partner list for that platform's MCP server in June 2026, alongside Pacvue, Dentsu, Havas, Innovid by Mediaocean and Omnicom's Jump450. Roku's data platform routed viewer data into Alli in January 2025. Innovid's pixel-free purchase attribution used PMG as a beta partner, with quick-service restaurant campaigns reported at 25 times more attributed revenue and 4.3% incremental sales lift.

The agency has also been unusually public about the cost side of agentic AI. PMG rolled out an internal tool called Alli For You to its full staff in mid-2026, pooling access to major models under a token cap per user per day, with an escalation review when someone hits the ceiling. Governance of that kind sits awkwardly next to marketing language about autonomous optimization, and it is a useful corrective: agencies deploying agents at scale are metering them because the compute bill is not theoretical.

Corporate scale supplies the rest of the context. PMG employs more than 1,000 people across offices in New York, London, Dallas and Fort Worth, Austin, Atlanta, Boston, Brighton, Costa Rica, Cleveland, Düsseldorf, Mexico City and Toronto. Client work spans Apple, Nike, CKE Restaurants, Dropbox, Zoom, Experian, Intuit, Kohler, Sephora, Travelex and Whole Foods. MediaPost named the firm 2025 Independent Agency of the Year.

Subjective, curation and the bid-time signal

Subjective's inclusion places a curation layer inside the decisioning loop rather than upstream of it.

The company has surfaced in Index Exchange arrangements before. On June 23, 2026, Subjective and Culture Hive made a Cultural Relevance Score available through Index Marketplaces, applying cultural scoring at the impression level across global connected television inventory. Twenty-eight days later, the same framework appeared inside Magnite's ClearLine, a pace that says something about how fast curation partnerships now propagate across competing sell-side platforms.

In the PMG arrangement, Subjective's content and audience intelligence feeds the decisioning engine directly at bid time, according to Index Exchange, with the stated aim of enabling contextual, outcome-aligned buys across premium streaming TV. The companies said they plan to add further content and audience intelligence partners as the pilot progresses, which implies the curation slot is designed to hold more than one supplier.

What the material does not establish

Several gaps are worth recording plainly, because the announcement reads as an architecture statement rather than a results statement.

No performance figures accompany the arrangement. There is no cost-per-outcome comparison, no win-rate change, no measured latency for this specific configuration, and no disclosed volume of spend flowing through it. The phrasing indicates a pilot in progress, with Index Exchange stating that PMG is currently automating against premium TV supply partners and activating through Index Cloud and Bedrock DSP where incremental benefits exist across the firm's client portfolio. Which supply partners, and what counts as an incremental benefit, are left unspecified.

Nor is there a timetable. Mobile app and display are named as later channels without dates. The expansion of curation partners is described as a plan rather than a commitment.

There is also an observability question that applies to the whole category rather than to this arrangement alone. Containerized decisioning restores impression-level computation, which is the case the sell side has been making. What it does not restore is per-impression visibility for anyone outside the container runtime. Decisioning happens inside a signed container that neither counterparty inspects by design, and the assurance rests on the cryptographic signature rather than on an inspectable record. Treon's reference to full transparency into buying quality describes what PMG can see about the inventory, which is a different claim from what an auditor could reconstruct about the decision.

Why it matters for media buyers

For agencies and advertisers, the arrangement is a test of whether proprietary decisioning is becoming available to buyers who do not own infrastructure.

If a mid-sized agency can rent exchange-side compute and run its own logic there, the strategic value of a large commercial DSP narrows toward reach and reporting rather than toward decisioning itself. That is the scenario Shevlin described, and the reason the identity of the pilot partner carries more signal than the technology. Bedrock proving the architecture in April was an engineering milestone. A 1,000-person independent agency with Apple and Nike on its roster routing streaming TV budget through it is a commercial one.

For publishers and media owners, the direction is toward buyers evaluating a larger share of available impressions rather than a filtered subset, which alters what supply-side throttling is for. For everyone downstream, the open question is measurement. The industry now has several architectures for moving intelligence to the impression and very little published evidence comparing what they deliver, which leaves buyers weighing vendor claims against each other without a neutral yardstick.

Timeline

Summary

Who: Index Exchange, a New York-headquartered independent supply-side platform; PMG, an independent platform company with more than 1,000 staff and clients including Apple and Nike; Bedrock Platform, a London-headquartered programmatic technology firm; and Subjective, a provider of agentic curation infrastructure for connected television. Named spokespeople are Mike Treon of PMG, Shane Shevlin of Bedrock Platform and Michael Richardson of Index Exchange.

What: A pilot integration placing PMG's media buying inside the exchange via Index Cloud, with Bedrock Platform's containerized demand-side platform acting as the bidding decisioning layer, activated directly from PMG's Alli Buyer Cloud, and Subjective feeding content and audience signals into each decision at bid time. Index Cloud provides access to more than 3,000 media owners.

When: Stated on September 10, 2026, building on Bedrock Platform's April 21, 2026 containerized DSP deployment on Index Cloud. Premium streaming TV runs first, with mobile app and display named as later channels without dates.

Where: Inside Index Exchange's own data center infrastructure rather than on external public cloud providers, across global streaming TV supply. PMG operates from thirteen offices spanning North America, Europe and Latin America.

Why: Public cloud compute costs have forced demand-side platforms to cap the requests they evaluate, leaving buyers optimizing against a sampled fraction of the market. Running decisioning code co-located with the exchange removes the network round trip and the economic reason to ration, and the arrangement tests whether an independent agency can deploy proprietary logic at exchange scale without operating bidder infrastructure of its own.