Index Exchange

What Index Exchange does

Index Exchange is a global independent supply-side platform (SSP) and digital advertising exchange founded in 2003 and headquartered in Toronto, Canada. The company operates a programmatic auction infrastructure that processes over 270 billion slot requests daily, connecting publishers, streaming TV platforms, mobile app developers, and app developers on the supply side with demand-side platforms (DSPs), agencies, and brands on the demand side across 10 countries in North America, Europe, and Asia-Pacific. Its modular platform comprises the core Index Exchange Platform for real-time bidding via OpenRTB, Index Marketplaces for curated deal-based inventory transactions, and Index Cloud — a neutral containerized compute environment launched in April 2026 that allows DSPs to deploy bidding models inside Index's infrastructure. Proprietary ad formats include Flex Video (clickable web video) and outstream video units.

Index Exchange generates revenue through transaction fees on programmatic ad impressions sold through its exchange, with no publicly disclosed pricing tiers beyond offering outstream inventory at no additional cost to publishers. The go-to-market is enterprise field sales to publishers and agencies, supplemented by API-first programmatic integration with DSPs and partnerships with major ad platforms including Magnite, FreeWheel, PubMatic, TripleLift, and OpenX. Customer segments span five buyer profiles: publishers/media owners, streaming TV publishers, app developers, marketers/agencies, and DSPs. Named customer references include Freestar, LADbible Group, and WPP Media, with documented outcomes of 86% video completion rates, 47% CPM uplift over banners, and 33% lift in purchase intent for select campaigns. The company operates engineering hubs in Toronto, New York, Berlin (via the 2022 Rivr Technologies acquisition), and Bengaluru. It is privately held with no disclosed external funding rounds, having funded the Rivr acquisition entirely from operating cash flow, and filed an antitrust lawsuit against Google in November 2025.

Name

Index Exchange

Legal name

Index Exchange Inc.

Website

https://indexexchange.com

Company type

Private

Founded year

2003

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Index Exchange is a global independent supply-side platform founded in 2003 that operates a programmatic digital ad exchange processing over 270 billion daily bid requests, serving publishers, streaming TV platforms, app developers, agencies, and DSPs across 10 countries.

Ownership category

akta.pro rank

Product category

Ad Exchange / Supply-Side Platform

NAICS

Securities and Commodity Exchanges (523210), Securities and Commodity Exchanges (52321), Securities and Commodity Exchanges (5232)

SIC

Security Brokers, Dealers & Flotation Companies (6211)

akta.pro primary industry

Retail Multi-Asset Exchanges (FSAFAEAA)

akta.pro secondary industries

Auction-Based Equity Trading Venues (Opening/Closing Auctions) (FSAFAAAF), Equity Index Futures & Options Exchanges (FSAFABAA)

Keywords

• Supply-side platform
• Programmatic advertising
• Ad exchange technology
• Real-time bidding
• Connected TV advertising

Headquarters

HQ city

Toronto

HQ country

Canada

HQ region

North America

Offices5 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

Technology or R&D, Personnel, Infrastructure, Operations, Marketing or Sales

Revenue model

1. Programmatic advertising transaction fees: Index Exchange operates as a supply-side platform (SSP) in the programmatic advertising ecosystem, facilitating auctions between publishers (supply) and demand-side platforms/advertisers (demand). Revenue is generated through transaction fees taken on ad impressions sold through the exchange.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

Index Exchange operates a global ad exchange and supply-side platform (SSP) that enables media owners to monetize digital advertising inventory through real-time, programmatic bidding auctions. The platform connects publishers with demand-side platforms (DSPs) and advertisers across display, online video, outstream, and connected TV (CTV)/streaming inventory, processing over 270 billion slot requests daily. Its product suite includes Index Cloud (a neutral compute environment for containerized decisioning), Index Marketplaces (curated deal-based inventory packages), and proprietary ad formats such as Flex Video.

Product overview

Index Exchange is a global supply-side platform (SSP) and ad exchange offering a modular platform architecture. The core Index Exchange Platform powers real-time bidding auctions across display, video, and CTV inventory, supplemented by Index Marketplaces for curated deal-based transactions and Index Cloud for containerized, partner-deployed AI/ML decisioning. Ad formats include Flex Video (interactive web video), outstream video, and streaming TV across connected devices. Additional modules cover addressable audience targeting, data and analytics, and programmatic deal management. The platform integrates via OpenRTB standard protocols and Prebid, with infrastructure supporting gRPC and HTTP-based real-time data enrichment.

Differentiator

Problem solved

Functional benefit

Brands

• Index Cloud: A neutral compute environment for decisioning closer to when impressions originate. Partners deploy their own models, data, and logic in isolated infrastructure adjacent to the transaction, providing the autonomy of the public cloud without latency, signal loss, cost premiums, or added overhead.
• Index Marketplaces
• Flex Video
• IX Labs

Products and services

• Index Exchange Platform Global digital advertising exchange and supply-side platform (SSP) enabling real-time bidding auctions for online ad inventory across websites, mobile apps, and streaming TV, processing high-volume bid requests and connecting publishers with demand-side buyers.
• Index Marketplaces

Quantifiable outcome

• 270+ billion slot requests processed daily
• +4 more outcomes

Named customers3 records

Segments5 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

AI capability6 records

Feature5 records

Partnerships

16 partnerships are on record, tiered minor and core.

• Culture Hive and SubjectiveminorStrategic or Co-development Partner · 23 June 2026Culture Hive Media Group and Subjective launched Cultural Relevance score powered decisioning capability available through Index Marketplaces for premium CTV.
• PhilocoreTechnology or Integration · 19 June 2026Philo partnered with Index Exchange for pause ads availability across its full ad-supported footprint, accessible both directly and programmatically through native ad server integration.
• PhilocoreTechnology or Integration · 18 June 2026Philo collaborated with Index Exchange alongside Magnite, Kargo, Nexxen, OpenGlass, OpenX, TripleLift, and WunderKIND Ads to bring pause ads to market.
• Walmart ConnectcoreTechnology or Integration · 27 April 2026Index Exchange integrated with Walmart Connect Select marketplace, enabling small and medium-sized businesses to buy streaming TV ads through Walmart's DSP alongside FreeWheel, Magnite, and PubMatic.
• UnitycoreTechnology or Integration · 22 April 2026Index Marketplaces provides access to Unity's mobile gaming inventory and first-party data, delivering first-to-market cross-channel activation across mobile, streaming, and desktop.
• Bedrock PlatformcoreStrategic or Co-development Partner · 21 April 2026Bedrock Platform became the first to pilot containerized DSP deployment on Index Cloud, enabling model-driven bidding at scale with custom models operating closer to impressions on dedicated infrastructure.
• AcxiomcoreTechnology or Integration · 15 April 2026Acxiom joined Index Exchange data vendor ecosystem, with audience insights integrating with Index Marketplaces to give curators and marketers more control in building data-driven deals.
• MediavinecoreTechnology or Integration · 14 April 2026Mediavine launched Curated Audiences in Index Marketplaces through expanded partnership. Index Exchange serves as the inaugural SSP for Mediavine's curated audiences.
• Ad Fontes MediacoreTechnology or Integration · 31 March 2026Ad Fontes brings real-time news quality signals to Index Exchange's Index Marketplaces, helping brands find resilient, high-quality news inventory as AI transforms discovery.
• Genius SportscoreTechnology or Integration · 27 March 2026Partnership enables Index Exchange clients to access Genius Sports' Moment Engine technology for programmatic sports advertising, expanding real-time live sports targeting capabilities beyond betting brands to financial services and food delivery advertisers.
• Rivr Technologies GmbHcoreStrategic or Co-development Partner · 9 June 2022Index Exchange acquired Berlin-based Rivr Technologies GmbH, a machine learning company focused on curating traffic supply-side platforms. The acquisition was funded entirely by Index's operating cash flow and aimed to help demand-side platforms better manage supply managed by Index.
• MagnitecoreChannel Partner/ Reseller/ DistributorProgrammatic advertising platform partner for pause ads and other ad formats.
• OpenXcoreChannel Partner/ Reseller/ DistributorProgrammatic advertising platform partner.
• PubMaticcoreChannel Partner/ Reseller/ DistributorProgrammatic advertising platform partner.
• FreeWheelcoreChannel Partner/ Reseller/ DistributorVideo advertising platform partner for streaming TV and advanced TV.
• TripleLift Inc.coreChannel Partner/ Reseller/ DistributorNative programmatic advertising platform partner.

Scale indicators11 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Magnite: Magnite is the largest independent supply-side platform, focused on CTV and video. It directly competes with Index Exchange across programmatic video, CTV, and omnichannel header bidding for the same publisher and DSP customers.
• PubMatic: PubMatic is a public independent SSP offering programmatic monetization across display, video, mobile, and CTV. It directly competes with Index Exchange for publisher supply and DSP demand integrations in similar omnichannel auctions.
• OpenX: OpenX is an independent global SSP providing programmatic ad exchange services across web, mobile, and CTV. It is a direct competitor in the same publisher/DSP ecosystem and also a channel partner alongside Index.
• FreeWheel: FreeWheel (Comcast) provides video and CTV ad management and monetization for publishers. It competes with Index Exchange specifically in CTV/streaming TV monetization and is also a Channel Partner for pause ads.
• TripleLift: TripleLift is an SSP specializing in native and high-impact programmatic advertising. It directly competes with Index's Flex Video and online video formats for publisher inventory and DSP demand.
• Equativ: Equativ (formerly Smart AdServer) is an independent global SSP and ad server. It directly competes with Index Exchange for publisher monetization, particularly in European markets where Index also operates.

Broad incumbents

• The Trade Desk: The Trade Desk is the largest independent demand-side platform. While operating on the buy side rather than sell side, it is a key Index Exchange customer/partner for bid optimization and competes at the platform level for advertiser relationships.
• Google Ad Exchange: Google AdX is the dominant walled-garden ad exchange, competing directly with Index Exchange for publisher inventory and DSP demand. Index filed an antitrust lawsuit against Google in November 2025 citing structural disadvantages vs. AdX.
• Amazon Publisher Services: Amazon Publisher Services (including Transparent Ad Marketplace) is a walled-garden SSP competing with Index Exchange for publisher supply and header bidding demand. It is a Broad Incumbent with overlapping capabilities but a much larger portfolio.

Emerging players

• Walmart Connect: Walmart Connect is an emerging retail media DSP that partnered with Index Exchange for SMB streaming TV buying via Walmart DSP. It represents an emerging walled-garden-adjacent player intersecting with Index's CTV and marketplace offerings.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/indexexchange
• YouTubeyoutube.com/channel/UC5_ALD_K0YIBiQWNrJW-HEA
• LinkedInlinkedin.com/company/index-platform
• Instagraminstagram.com/indexexchange
• Facebookfacebook.com/indexexchange

Revenue estimate

Valuation estimate

Number of profiles

Profiles13 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A1 record

Investments1 record

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Index Exchange