The next phase of programmatic is here. Learn how agentic sell-side decisioning brings intelligence to the impression, reshaping performance on the open internet.
Read moreIndex Marketplaces
Smarter Supply. Better Outcomes.
Bring intelligence, optimization, and measurement directly to the sell side with Index Marketplaces. Activate premium data and other powerful media solutions across the entire open internet to create high-performing deal packages—all without any added platform fees.
Activate sell-side decisioning with Index Marketplaces
Activate sell-side decisioning with Index Marketplaces
Optimize bids before they reach the buy side
Maximize the value of every impression with precision targeting at internet scale.
Reduce inefficiencies with faster decisions
Apply intelligence in the opening milliseconds of the auction to achieve greater scale and performance.
Connect with partners to further programmatic innovation
Enhance deal outcomes by activating data, algorithmic, measurement, and curation solutions from leading partners directly within your workflow.
Built with the industry, for the industry
Our partner ecosystem strengthens every Marketplace package—from premium data and measurement signals to advanced algorithmic decisioning. Together, we’re raising the standard for transparency, efficiency, and quality to drive stronger performance across the open internet.
For media owners
Earn more from every impression
Unlock incremental demand opportunities without added fees or extra work while maintaining full control of your inventory, settings, and data.
For media buyers
Better outcomes, less waste
Maximize your working media and optimize performance by minimizing waste and eliminating unnecessary fees.
For solution providers
Drive innovation without complexity
Bring your data, algorithms, or programmatic expertise to Index’s infrastructure to scale quickly and deliver measurable value.
Data vendors can easily onboard into our Data Vendor Ecosystem—making segments instantly available in Marketplaces without custom integrations or added fees.
Why build an Index Marketplace?
Plug-and-play setup
For rapid configuration with no engineering required
Easy deal creation and packaging
Powered by your own data and rules
Real-time dashboards and audit logs
For performance tracking and visibility
Total transparency
Gain clear insight into inventory quality and how every transaction works
Instant, scaled access
To premium audience and contextual segments from our trusted Data Vendor Ecosystem partners
Hear from Marketplace partners
“Index Marketplaces effectively allows us to move into this new era where every consumer is addressable, every signal can be used to drive outcomes, and we can deliver performance on the open internet that rivals walled gardens.”
– Joe Root
Co-founder and CEO of Permutive
“With Index Marketplaces, we’re not just accessing better supply—we’re making smarter decisions earlier in the process. Sell-side decisioning allows us to shape outcomes more proactively, delivering consistent results our clients can trust.”
– Britany Scott
VP of Growth, Smart Supply by AI Digital
“What used to feel complicated, for example, combining different datasets or timing campaigns to real-world conditions, now happens automatically with sell-side decisioning.”
– Dave Olesnevich
VP of Weather Data and Advertising Products at The Weather Company
“By leveraging intelligent curation, we’re not only reducing waste but also setting a new standard for programmatic efficiency. This partnership exemplifies how industry leaders can come together to push the boundaries of what’s possible, ensuring long-term value for brands, publishers, and media buyers alike.”
– Ryan Lammela
Group Director, Channel Activation, Butler/Till
Latest News and Partner Announcements
PRESS RELEASE
inPowered AI and Kantar Partner Exclusively to Bring Brand Lift Optimization to Programmatic Advertising via Index Marketplaces.
PRESS RELEASE
Elcano, Raptive, and Index Exchange Launch Raptive Unison to Bring Exclusive Creator Audiences to CTV and Beyond.
CASE STUDY
Context at Streaming TV Scale: PMG, IRIS.TV, and Index Exchange Drive Brand Lift.
IN THE NEWS
AdExchanger: Index Exchange Launches A Data Marketplace For Sell-Side Curation.
BLOG
Innovators Unscripted With The Weather Company
CASE STUDY
How Smart Supply by AI Digital Improved Video KPIs by 19% via Index Marketplaces
Learn how Index Marketplaces and sell-side decisioning helped Smart Supply deliver impressive video performance, driving efficiency and long-term value.
Learn moreCASE STUDY
How SWYM.ai Leveraged Index Marketplaces To Deliver 56% Boost in Client KPIs for Butler/Till
Leveraging Index Marketplaces, SWYM.ai was able to train their algorithm on performance signals across the entire transaction—including sell-side signals from Index’s robust, high-quality supply.
Learn moreAn Award-Winning Platform
AdExchanger Best Sell-Side Focused Technology
Frost & Sullivan’s Global New Product Innovation Recognition
Learn more about Index Marketplaces and become a partner today
Latest from the blog
All ArticlesSee how a major retailer partnered with Index Exchange and inPowered AI to drive more efficient site visits through sell-side decisioning and Index Marketplaces.
Read moreAt every major inflection point in programmatic advertising, the industry goes through a familiar phase. A powerful new idea emerges, and then the debate over what it actually means follows.
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