An audience marketplace is a catalogue of pre-built audience segments, supplied by data companies and licensed by advertisers to decide which impressions to buy. A segment might be "households with children under five". The marketplace exists because most advertisers hold too little data of their own to reach new customers at scale, while data brokers, retailers, publishers and panel owners hold data they want to sell without negotiating a contract with every buyer. The marketplace standardises listing, price and billing, and takes a cut.

The term is used both as a generic description and as a product name. Adobe calls its feature inside Audience Manager "Audience Marketplace", LiveRamp operates the "Data Marketplace", The Trade Desk refers to its "third-party data marketplace" and Amazon lists vendors in what PPC Land has described as its 3P Audience Hub.

How an audience marketplace works

A data provider builds a taxonomy of segment names and descriptions and attaches identifiers to each segment: cookies, mobile advertising IDs, hashed emails converted into a pseudonymous ID, or IP addresses for connected television. Providers integrate directly or through an onboarder such as LiveRamp, which matches offline records to online identifiers and distributes segments. LiveRamp's documentation says sellers can reach more than 600 platforms this way, and that each listing carries a segment name, permitted use cases and a price.

The Trade Desk's onboarding guide for data providers shows what a listing requires in practice. Segments sit in a flat taxonomy under a common parent node. Each user ID has a default time to live of 90 days, with a maximum of 180, and segments must be refreshed every 30 days to stay active. A segment becomes buyable only once its name passes policy review, it has received user IDs and it carries a rate. Segments based on health conditions, race, ethnicity, religion, sexual orientation or minors are not permitted. Since August 20, 2020, sellers distributing through LiveRamp have needed The Trade Desk's pre-approval, according to LiveRamp.

On the buy side, a trader browses the catalogue inside the demand-side platform (DSP) and attaches segments to a campaign line item as targeting or exclusions. At auction time, the DSP checks whether the user ID in a bid request belongs to a selected segment and bids accordingly. In open real-time bidding, provider data can also travel inside the request itself: OpenRTB carries segments in the user.data array, where each provider entry holds segments with an id, name and value, as PPC Land's data broker explainer describes.

Pricing and revenue share

Two models dominate. The older one is a fixed CPM, a cost per thousand impressions on which the segment was used. The more common one today is percentage of media, often with a CPM cap. The Trade Desk's guide gives a worked example: a rate card of 50% of media with a $5 CPM cap. On a $5 display CPM the data costs $2.50 per thousand; on a $25 connected TV CPM, the cap holds the data charge at $5. Providers are paid fractionally when several segments inform one bid, and rate cards can differ by partner or advertiser.

Google's Display & Video 360 (DV360) uses the same structure for commerce audiences, segments that retail and commerce media networks license from their shopper data. According to Google's help centre, the fee is charged as a third-party fee, always a percentage of media, sometimes capped by CPM, with licensing agreed outside the platform.

Those fees add up. When The Trade Desk launched Audience Unlimited on September 29, 2025, it said advertisers using third-party data spent nearly 20% of media cost on it, a company figure. The product replaced segment-by-segment prices with a flat 3.3% or 4.4% of impression cost, depending on tier, or bundled data at no extra charge in its AI-managed Performance Mode. Jeff Green, The Trade Desk's chief executive, explained the problem in June 2026: "The cost has been really complicated for marketers, so generally they don't use it."

For the marketplace operator, the business is material. LiveRamp's Data Marketplace generated $35 million in the quarter ended June 30, 2025, up 9% year on year, against total quarterly revenue of $194.8 million.

Origin and evolution

Audience marketplaces grew out of the data exchanges of the late 2000s. eXelate was founded in Israel in 2007, and BlueKai launched an auction-based data exchange in 2008, according to TechCrunch, selling shopping and research signals to ad networks and publishers. Nielsen bought eXelate in March 2015 for a price AdExchanger's sources put close to $200 million, citing a plan to expand its "already rapidly growing data marketplace". Oracle paid about $400 million for BlueKai and about $1.2 billion for Datalogix in 2014, according to PPC Land's account of Oracle's exit.

Amazon opened third-party audiences in its DSP on October 28, 2021, initially in Canada, Japan and five European markets, according to Amazon Ads.

The first retreat came from Europe. After class actions were filed in the UK and the Netherlands in August 2020 accusing Oracle and Salesforce of breaching the General Data Protection Regulation (GDPR), Oracle stopped selling third-party targeting data across Europe in September 2020. It then announced in June 2024 that it would leave advertising altogether, with advertising revenue having fallen from about $2 billion in 2022 to about $300 million. In DV360, Oracle audiences including BlueKai and Datalogix were removed on September 30, 2024, and line items relying on them were paused.

The industry's answer to criticism was disclosure. IAB Tech Lab completed version 1.0 of its Data Transparency Standard in mid-2019, defining a label covering provenance, recency and segmentation criteria, backed by an annual audit. Adoption was slow. Yahoo became the first DSP to implement the labels in January 2025, with up to 20 disclosure fields, and Anthony Katsur, IAB Tech Lab's chief executive, called the lack of uptake since 2019 "a travesty".

Why it matters for marketers

The marketplace is how most advertisers buy reach beyond their own customer lists. Retailers, telecoms operators and streaming platforms now list segments alongside traditional brokers. Nielsen segments arrived in Amazon DSP and Amazon Marketing Cloud in December 2025 through Zeotap, and Adsquare's location segments became available in six Amazon markets on July 23, 2026, activated without a separate contract. Owning the catalogue has become a reason to choose one DSP over another.

Exclusivity sharpens that point. T-Mobile's carrier-based segments for digital out-of-home screens are sold only through Vistar Media's own buying platform, according to an October 2026 announcement, rather than across DSPs.

Limitations and criticisms

Accuracy is the most persistent dispute. Nico Neumann, Catherine Tucker and Timothy Whitfield tested more than 90 audiences from over 19 data brokers in field studies published in Marketing Science in November 2019. Targeting a gender and age group hit the intended segment 59% of the time, and gender alone was identified no better than chance. Interest segments scored 72.8% to 87.4%, flattered by how common those interests are. Average extra costs of around 151% for display targeting made the gain over random selection, in the authors' word, "disappointing". Connected television has its own version of the problem: an Adstra study found IP-based targeting failed about three times in four.

Opacity follows. Segment names describe intent, not method. A buyer often cannot tell whether "in-market for travel" was modelled from a lookalike, inferred from browsing or observed from a booking. Labels help only where adopted.

Regulation is tightening. California's Delete Act created a deletion platform, DROP, live since January 1, 2026; it logged 242,000 sign-ups in its first eight weeks, and from August 1, 2026 registered brokers must process requests at least every 45 days. The US Federal Trade Commission closed its Kochava case in May 2026 with an order requiring consent checks on location data suppliers, as PPC Land's data broker explainer records.

Neutrality is a newer worry. Publicis Groupe agreed in May 2026 to buy LiveRamp for $2.5 billion in equity value, raising the question of whether a holding company can run neutral data infrastructure used by its rivals.

Not the same as

Data marketplace in the broad sense covers any venue for licensing datasets, including Snowflake and Databricks listings for analytics. LG Ad Solutions, for example, offers television viewing data through Databricks Marketplace by contract. An audience marketplace is narrower: its products are targetable segments wired into ad buying.

Data management platform (DMP) is software for collecting and organising audience data. Many DMPs, including Adobe Audience Manager and the former BlueKai, host a marketplace module, but the DMP is the warehouse and the marketplace is the shop.

Private marketplace (PMP) is an invitation-only auction for publisher inventory, accessed through a deal ID. It sells impressions, not data, though curated deals increasingly bundle the two.

Seller-defined audiences are publisher segments sent in bid requests as taxonomy codes. They describe the reader without a third-party broker, as PPC Land's explainer sets out.

Recent developments

Three shifts define the past year. First, data is moving to the sell side: Expedia's traveller data reached buyers through Magnite curated deal IDs in April 2026, usable from any DSP. Second, destinations are consolidating: Microsoft shut its Invest DSP, formerly Xandr, on February 28, 2026. Third, the product is changing. LiveRamp extended its Data Marketplace on January 6, 2026 to AI training datasets and partner models, and The Trade Desk's Audience Unlimited, scheduled for all users from early 2026, lets software choose segments that traders once picked by hand. Whether that solves the accuracy problem or hides it inside a flat fee has not been tested independently.

Timeline

  • 2007: eXelate is founded in Israel
  • 2008: BlueKai launches an auction-based data exchange
  • 2014: Oracle acquires BlueKai and Datalogix
  • March 4, 2015: Nielsen acquisition of eXelate reported, at an estimated $200 million
  • Mid-2019: IAB Tech Lab completes Data Transparency Standard 1.0
  • November 4, 2019: Neumann, Tucker and Whitfield publish their field study on third-party segment accuracy
  • August 20, 2020: The Trade Desk requires pre-approval for data sellers distributing via LiveRamp
  • September 2020: Oracle stops selling third-party targeting data in Europe
  • October 28, 2021: Amazon DSP launches third-party audiences in seven markets
  • June 2024: Oracle announces its exit from advertising
  • September 30, 2024: Oracle audiences removed from DV360
  • January 2025: Yahoo becomes the first DSP to display Data Transparency labels
  • September 29, 2025: The Trade Desk announces Audience Unlimited
  • December 8, 2025: Nielsen segments become available in Amazon DSP and Amazon Marketing Cloud
  • January 1, 2026: California's DROP deletion platform goes live
  • January 6, 2026: LiveRamp extends its Data Marketplace to AI training data and models
  • February 28, 2026: Microsoft Invest DSP shuts down
  • May 2026: Publicis Groupe agrees to acquire LiveRamp; the FTC closes its Kochava case
  • July 23, 2026: Adsquare segments go live in Amazon DSP in six markets
  • October 5, 2026: Vistar Media announces T-Mobile segments available only through its own platform

Summary

Who. Data providers such as Acxiom, Nielsen, Adsquare and retailers list segments; onboarders such as LiveRamp and Zeotap distribute them; DSPs including The Trade Desk, Amazon DSP, DV360 and Yahoo host the catalogues; advertisers and agencies buy. IAB Tech Lab sets disclosure standards, and regulators in California, the US federal government and Europe set limits.

What. An audience marketplace is a catalogue of licensable audience segments built into ad buying tools, with standard listings, pricing and billing. Segments are usually priced as a percentage of media cost with a CPM cap, or as a fixed CPM.

When. Data exchanges appeared in 2007 and 2008, moved into DSPs and walled gardens over the following decade, contracted in Europe from 2020, and in 2025 and 2026 shifted towards bundled pricing, curated deals and AI-driven selection.

Where. Inside DSPs, DMPs, onboarding platforms and, increasingly, supply-side platforms through curated deal IDs. Clean rooms such as Amazon Marketing Cloud let segments be combined with advertiser data without direct transfer.

Why. Advertisers need reach beyond their own customer data, and data owners want to sell without bilateral contracts. The marketplace supplies both, at a cost that can approach a fifth of media spend and with accuracy that independent research has repeatedly questioned.