See how the Guardian boosted revenue by 4% and impressions served by 45% with Index Exchange’s Transparent Dynamic Take Rates, driving transparency and efficiency.
Read moreIndex Marketplaces: Smarter Supply. Better Outcomes.
Bring intelligence, optimization, and measurement directly to the sell side with Index Marketplaces. Activate premium data and precision targeting capabilities across the entire open internet to create high-performing deal packages—all without any added platform fees.
Bring intelligence, optimization, and measurement directly to the sell side with Index Marketplaces. Activate premium data and precision targeting capabilities 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
Up-level deal performance by seamlessly partnering with industry leaders in algorithmic decisioning, curation, premium data, and more.
Earn more from every impression
Unlock more demand without added fees or extra work, while maintaining control of your inventory and data.
Better outcomes, less waste
Maximize your working media and optimize performance by minimizing waste and eliminating unnecessary fees.
Drive innovation without complexity
Layer your data, algorithms, or programmatic expertise onto Index’s infrastructure to quickly scale innovation and deliver more value to the market.
Data vendors can easily onboard into the Data Vendor Ecosystem to make your segments seamlessly 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
Into performance drivers and buyer behaviors
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
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 moreHow 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 moreBest Sell-Side Focused Technology
2025 AdExchanger Awards

Learn more about Index Marketplaces and become a partner today
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