Index Exchange
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.
- Company typePrivate
- Founded2003
- HeadquartersToronto, Canada
- Headcount501–1,000
- GTM typeB2B
- OfferingSoftware
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.
Index Exchange firmographics
Firmographics- 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
Index Exchange industry classification
Industry- 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
Where Index Exchange is headquartered
LocationHeadquarters
- HQ city
- Toronto
- HQ country
- Canada
- HQ region
- North America
Offices5 records
Markets served
Index Exchange business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Personnel, Infrastructure, Operations, Marketing or Sales
Revenue model
- 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
| Model | Billing | Price |
|---|---|---|
| Transaction based/ take rate | Pay-as-you-go | Outstream ad unit available at no additional cost |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels6 records
Index Exchange product offering
Product offeringCore 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
Companies that use Index Exchange
Customer profileNamed customers3 records
Segments5 records
Ideal customer profiles5 records
Index Exchange technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
AI capability6 records
Feature5 records
Index Exchange partnerships and signals
Strategic signalPartnerships
16 partnerships are on record, tiered minor and core.
- Culture Hive and SubjectiveminorCulture Hive Media Group and Subjective launched Cultural Relevance score powered decisioning capability available through Index Marketplaces for premium CTV.
- PhilocorePhilo partnered with Index Exchange for pause ads availability across its full ad-supported footprint, accessible both directly and programmatically through native ad server integration.
- PhilocorePhilo collaborated with Index Exchange alongside Magnite, Kargo, Nexxen, OpenGlass, OpenX, TripleLift, and WunderKIND Ads to bring pause ads to market.
- Walmart ConnectcoreIndex 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.
- UnitycoreIndex 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 PlatformcoreBedrock 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.
- AcxiomcoreAcxiom 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.
- MediavinecoreMediavine launched Curated Audiences in Index Marketplaces through expanded partnership. Index Exchange serves as the inaugural SSP for Mediavine's curated audiences.
- Ad Fontes MediacoreAd 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 SportscorePartnership 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 GmbHcoreIndex 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.
- MagnitecoreProgrammatic advertising platform partner for pause ads and other ad formats.
- OpenXcoreProgrammatic advertising platform partner.
- PubMaticcoreProgrammatic advertising platform partner.
- FreeWheelcoreVideo advertising platform partner for streaming TV and advanced TV.
- TripleLift Inc.coreNative programmatic advertising platform partner.
Scale indicators11 records
Recent moves7 records
Expansion highlights6 records
Index Exchange competitors and assessment
Company assessmentDirect 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
Index Exchange social profiles
Digital presenceIndex Exchange financial estimates
Financial estimateRevenue estimate
Valuation estimate
Index Exchange leadership team
Management profileNumber of profiles
Profiles13 records
Index Exchange subsidiaries and ownership
Company hierarchySubsidiaries1 record
Index Exchange funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Index Exchange M&A and investment
M&A and investmentM&A1 record
Investments1 record
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Index Exchange
What does Index Exchange do?
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.
Is Index Exchange a public or private company?
Index Exchange is a private company. It is classified as family owned and is currently operating.
When was Index Exchange founded?
Index Exchange was founded in 2003. It employs 501 to 1,000 people.
Where is Index Exchange based?
Index Exchange is headquartered in Toronto, Canada, in the North America region.
How does Index Exchange make money?
One revenue line is on record: programmatic advertising transaction fees.
Who are Index Exchange's main competitors?
Direct peers on record are Magnite, PubMatic, OpenX, FreeWheel, TripleLift and Equativ. Broad incumbents are The Trade Desk, Google Ad Exchange and Amazon Publisher Services. Walmart Connect is listed as an emerging player.
Does Index Exchange have an API?
Yes. Index Exchange offers APIs for real-time data integration and programmatic ad operations. Partners can deploy real-time decisioning models in Index Cloud via gRPC (recommended for new integrations) or HTTP (legacy support). The classification endpoint SLA is 5 milliseconds. Supports OpenRTB 2.6 protocol specification for bid request/response communication. Partners deploy containers exposing orchestration endpoints (liveness /heartbeat, readiness /healthcheck), metrics endpoint (/metrics in Prometheus format), and classification endpoint (/enrichment for data partners). Resource requirements: 10 CPU cores, 10 GiB memory, 100,000 QPS capacity per container. Container deployment via Docker Hub with CalVer versioning. Helm/Argo CD deployment supported. Authentication supports OAuth, token-based (query string or header), and IP allowlisting. Developer documentation is at api.indexexchange.com/reference.
What industry is Index Exchange in?
Index Exchange's product category is Ad Exchange / Supply-Side Platform. Its primary akta.pro industry code is FSAFAEAA, Retail Multi-Asset Exchanges, with a secondary code of FSAFAAAF, Auction-Based Equity Trading Venues (Opening/Closing Auctions). Its NAICS code is 523210 and its SIC code is 6211.