By Muqadas Batool
Seo Content Writer
Published: 26/9/2026
Curation was supposed to make programmatic buying cleaner. Instead of asking buyers to sort through huge volumes of inventory, a curator can select supply, add data or quality signals, package it into a deal, and make that package available through a Deal ID. The contradiction is obvious: curation removes some complexity while creating another commercial layer that can charge for doing it.
That is the central issue behind curated marketplaces programmatic buying in 2026. The layer can select inventory, apply audience or quality signals, optimize the package, and simplify activation. It can also introduce a new fee or margin between the buyer and the underlying supply.
Curation can create real value, but buyers should be able to identify exactly what that value is before paying for it.
What a curated marketplace actually is
A curated marketplace is a pre-assembled package of inventory, usually combined with audience, contextual, quality, performance, or other signals, that a buyer can activate as a deal rather than building the selection one piece at a time.
IAB Europe’s 2026 guide describes curation as the selection, organization, and packaging of inventory, data, and signals to make programmatic supply easier to understand, evaluate, and activate.
The important part is the selection and organization. A curator can decide which publishers, inventory types, audience signals, or quality criteria enter the package. The buyer then receives a more structured buying opportunity.
That does not automatically make a curated deal a private marketplace in the traditional sense. A PMP can represent a direct agreement between a media owner and buyer for specified inventory. A curated deal adds a selection or packaging layer in which another party combines inventory, data, quality signals, or other inputs.
So the distinction is useful:
- PMP: a private buying arrangement around specified inventory and commercial terms.
- Curated deal: a packaged selection where a curator adds selection, data, technology, optimization, or another defined layer of value.
Deal curation can therefore operate through PMP infrastructure without making every PMP a curated marketplace.
Who is doing the curating
The short answer is: more than one type of company.
Supply platforms can provide the infrastructure that lets sellers and marketplace partners package inventory. Index Exchange, for example, describes marketplace partners as entities such as media agencies, data providers, and retail media networks that curate media solutions and package them for buyers.
Agency curation businesses can use their knowledge of audiences, media quality, and campaign objectives to build packages for advertisers. Their commercial role can sit closer to media strategy and activation than to raw inventory distribution.
Data companies can combine audience signals with selected inventory. Lotame, for example, positions its Curated Marketplaces around combining custom audiences with trusted, brand-safe media supply and activating those packages through DSPs.
Retail media networks can also act as curators when they package their own audience or commerce signals with offsite inventory. This gives advertisers access to retail-derived signals without requiring them to build every relationship independently.
Independent curators form another category. These businesses can focus specifically on assembling inventory and data around a buyer’s audience or campaign objective.
This is why curation ad tech is becoming a category rather than a single product. The commercial question is not simply who created the deal. It is what that party contributes and how it gets paid.
IAB Tech Lab’s Deals API, finalized in February 2026, specifically aims to make deal terms clearer and identify the parties involved in curating and selling a package.
What curation promises
The basic promise is straightforward: give the buyer a better-organized version of the market.
A curator may remove unsuitable inventory, combine selected publishers, apply audience signals, add contextual information, or use performance data to adjust the package. Magnite, for example, describes its ClearLine curation product as combining premium supply, first-party data, and content signals within the curation and activation process.
That can matter more as traditional addressability changes. Cookie deprecation and broader privacy changes have increased the importance of first-party data, contextual signals, and other forms of addressability.
Lotame explicitly positions its curated marketplaces around cookieless audience activation, while its broader audience offering includes cross-channel targeting across web, mobile, CTV, and other environments.
Curation can also help buyers prioritize viewability, suitability, attention, or other quality signals. In theory, that gives the buyer a more controlled media package instead of an enormous pool of inventory that requires additional filtering.
But none of this guarantees better campaign performance.
The benefit exists only if the selection creates value that the buyer could not get as efficiently through another route.
Where the new fee sits
This is where the middle layer becomes commercially interesting.
Imagine a buyer wants $100,000 of media.
Direct path:
Buyer → selected seller inventory → media impression
Curated path:
Buyer → curator → selected and enriched inventory → seller → media impression
The second path does not automatically cost more. The curator may reduce operational work, improve selection, add valuable data, or consolidate multiple supply relationships into one usable package.
But the curator can also charge for that service.
Microsoft’s Curate documentation explicitly describes curated transactions that can include a Microsoft technology fee and a curator margin. Its documentation also explains that curator margins can use either a percentage or CPM structure.
Microsoft separately documents curator margins as a source of profit for the curator, while its reporting identifies curator margin, curator technology fees, and curator net media cost as separate financial concepts.
So, how much does curation cost? There is no single universal rate that buyers can apply across the market.
| Buying path | What the buyer gets | Potential extra layer | What should be disclosed | Main comparison question |
| Direct buy | Access to selected seller inventory | Seller, SSP, or platform charges | Inventory, price, deal terms | What would this cost without curation? |
| Curated buy | Pre-selected inventory plus data, quality, or optimization | Curator fee, margin, data, or technology charges | Curator, fee type, data source, inventory scope | What additional value does the curator add? |
| Curated multi-seller package | One deal covering multiple sellers | Curator plus possible platform or data charges | Sellers, inventory logic, commercial parties | Does consolidation justify the added layer? |
These are structural examples, not market pricing benchmarks.
A buyer should distinguish between a published fee, a reported fee, an estimated fee, and an undisclosed fee rather than treating all four as the same thing.
IAB Tech Lab’s Deals API supports clearer deal-level information and aims to show which parties participated in curating and selling the package. That matters because the buyer needs to understand not only what the deal contains, but also who sits inside the transaction.
For the broader mechanics of supply paths, see the site’s related Adtech and Measurement coverage rather than rebuilding the entire supply-chain explanation here.
The commercial test is simple: does the saving or value created by curation outweigh the fee and any additional complexity?
That is the real question behind curated marketplaces programmatic buying. A lower operational burden can have value. So can better inventory, unique data, or stronger quality controls. But buyers should measure those benefits against the actual economics.
The transparency question
A useful curated marketplace should make the package easier to understand, not harder.
Buyers should know what inventory the curator selected, what signals shaped the selection, where the audience data came from, and which companies actually participate in the transaction. They should also know whether the curator owns supply, represents supply, supplies the data, or simply operates the technology.
That last point matters because incentives can overlap. A company that controls both the selection technology and some of the underlying supply may have a different commercial position from an independent curator selecting inventory from unrelated sellers.
The market is moving toward more explicit disclosure. IAB Tech Lab’s Deals API identifies deal participants and aims to provide visibility into curated deals that does not normally appear in the bid stream.
IAB Europe’s 2026 curation guide also highlights transparency, data provenance, fees, measurement, control, and commercial incentives as questions buyers should examine before relying on curated marketplaces.
That is the right direction.
The buyer does not need every operational detail. The buyer needs enough information to understand what changed between the direct inventory and the curated product, who changed it, and what that change costs.
How to tell a useful curated deal from a repackaged one
The easiest mistake is to assume that a Deal ID with a new name represents a genuinely different media product.
It may. It may also contain largely the same inventory with another targeting label attached.
The Curation Value Test
Before approving a curated deal, ask these 7 questions:
- Is the fee disclosed?
Ask whether the curator charges a percentage, CPM, flat fee, margin, data fee, or another commercial charge. If the fee remains undisclosed, record that explicitly. - What exactly is being filtered?
Ask for the inventory, audience, contextual, quality, performance, or other criteria that determine inclusion. - What data powers the filtering?
Ask whether the package uses first-party, publisher, third-party, contextual, attention, commerce, or modeled signals. - Is the data source named and properly licensed?
A segment name alone does not tell a buyer where the signal came from or whether the curator has the right to use it. - Can the buyer see the sellers or inventory list?
The level of transparency may vary, but buyers should understand what supply actually sits behind the package. - What is genuinely different from a direct buy?
Ask the seller to identify the specific service or value added by curation. - Could the same inventory be assembled directly?
If the answer is yes, compare the operational effort, data access, quality controls, and total cost rather than comparing only CPM.
A useful curated deal should survive these questions.
If the seller can explain the package clearly, show the underlying value, disclose the commercial structure, and demonstrate something the buyer cannot easily reproduce, the curation has a clearer economic case.
If the answer is mostly “trust the package,” the buyer has less evidence that the middle layer adds enough value to justify its cost.
Where this ends up
Two developments look plausible.
One possibility is consolidation. As more companies offer curation, buyers may prefer a smaller group of curators that can prove inventory quality, data provenance, commercial transparency, and measurable outcomes.
Another possibility is normalization. Curation may simply become a standard way to package programmatic supply, with its fee treated like any other media cost. The expansion of products from companies such as Microsoft, Magnite, Lotame, and other supply and data businesses shows that curation has moved beyond a narrow experimental concept.
The more plausible path is a mixture of both: curation becomes normal, while buyers become more selective about which versions deserve budget.
Measurement will help decide that.
Marketing mix modelling can assess whether curated buying contributes at the broader channel or campaign level. Incrementality testing can ask whether the curated package creates additional outcomes rather than simply receiving credit for existing demand.
That makes measurement transparency important. A curated deal that looks efficient in-platform but cannot demonstrate broader business value has a harder commercial case over time.
The read
Curation has not magically removed complexity from programmatic. It has moved some of that complexity into a new layer.
That is not automatically a problem. A buyer can reasonably pay for selection, data, quality control, optimization, or operational simplicity when those things create measurable value.
The problem starts when the package makes the transaction look simpler while making the economics harder to see.
So the useful question is not “Is curation good?”
It is: “What did the curator actually change, what did that change cost, and what evidence shows it was worth paying for?”
That is the test I would apply to curated marketplaces programmatic deals before approving them.
Ask those 3 questions before the next curated deal gets approved.
FAQ
What is a curated marketplace in programmatic?
A curated marketplace packages selected programmatic inventory with data, audience, contextual, quality, performance, or other signals into a ready-to-buy deal. The curator performs the selection and organization so the buyer does not need to assemble every component independently. The resulting package typically activates through a Deal ID.
How much does curation cost?
There is no universal curation fee. Current infrastructure supports different structures, including percentage-of-spend, flat, CPM, and no-fee models, while some commercial arrangements remain undisclosed. Microsoft documentation also describes technology charges and curator margins. Buyers should request the exact fee structure for the specific deal.
Does curation reduce the ad tech tax?
It can reduce unnecessary costs or operational inefficiency, but curation can also introduce its own fee or margin. The relevant comparison is the total economics of the curated route versus a realistic alternative, including media quality, data value, operational effort, and measurable outcomes.
Who runs curated marketplaces?
Supply platforms, agency businesses, data companies, retail media networks, and independent curators can all operate or participate in curated marketplaces. Their roles differ depending on whether they provide inventory infrastructure, audience data, media strategy, or curation technology.
What is the difference between a private marketplace and a curated deal?
A private marketplace generally refers to a negotiated programmatic buying arrangement between selected buyers and sellers. A curated deal adds a selection or packaging layer in which a curator combines inventory, data, quality signals, or other inputs. A curated deal can use PMP infrastructure, but the terms are not interchangeable.
Should advertisers use curated marketplaces?
Advertisers can consider curated marketplaces when the package provides a clear benefit such as unique data, selected inventory, useful quality controls, operational simplicity, or measurable performance. The decision should depend on the specific deal’s transparency, economics, inventory, data provenance, and results.
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Source Links
Microsoft’s Curate documentation
