Index Exchange vs Foursquare
Side-by-side comparison of AI visibility scores, market position, and capabilities
$127-176M revenue 2025; 594 employees Dec 2024; Frost & Sullivan 2025 Innovation Award; Header Tag most-used header-bidding tech 2024; programmatic ad market $595B 2024 to $800B 2028; SSP leader
About
Index Exchange is a global programmatic advertising marketplace founded in 2001 in Toronto, Canada, originally as a traditional ad network and reborn as one of the industry's most trusted independent supply-side platforms. The company's core technology provides publishers with a transparent, high-performance programmatic auction infrastructure for selling display, video, and connected TV advertising inventory, with a strong emphasis on data privacy, header bidding innovation, and clean supply chain practices in an industry often criticized for opacity.\n\nIndex Exchange's platform connects thousands of premium publishers with hundreds of demand-side platforms and agency trading desks, facilitating billions of daily ad transactions across web, mobile, and CTV environments. The company's Header Tag technology was ranked the most widely used header-bidding solution in 2024, reflecting its deep integration into the publisher technology stack. Index Exchange differentiates through its commitment to transparency — providing buyers with detailed supply path information and working to reduce the intermediary layers and fraud that inflate costs across programmatic ecosystems.\n\nIndex Exchange generated between $127 million and $176 million in revenue in 2025 and received Frost & Sullivan's 2025 Innovation Award, underscoring its continued product investment in a consolidating industry. As privacy regulations reshape digital advertising and third-party cookie deprecation forces structural changes in targeting and measurement, Index Exchange's clean supply path positioning and publisher-first approach make it a preferred partner for premium publishers navigating a period of significant disruption. Its independence from major buy-side platforms gives it credibility on both sides of the marketplace.
Geospatial intelligence platform with 100M+ POIs, 9B+ monthly visits, and foot traffic analytics. NYC. Serves advertisers, developers, and enterprise analysts globally.
About
Foursquare is a New York City-based geospatial intelligence company that has evolved from its origins as a consumer check-in app into a leading enterprise location data platform. Founded in 2009 by Dennis Crowley and Naveen Selvadurai, Foursquare now powers location intelligence for the world's largest enterprises through two product categories: specialized location data products for developers and data scientists (anchored by Places, their 100 million-plus point-of-interest dataset across 200+ countries), and marketing measurement and targeting solutions for advertisers seeking to measure the offline impact of digital advertising.
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