Identity Resolution

Adobe Experience Platform is a centralized suite of analytics and customer experience management solutions designed to enable real-time personalization and user interaction across digital environments.

LiveRamp is a data onboarding and collaboration platform that gathers a company's online and offline customer data, maps it to individual customer profiles, and uploads enriched audience segments to advertising platforms.

Oracle Advertising was an American cloud-based consumer data collection, activation, and measurement platform for digital advertisers, formed when Oracle acquired Datalogix in December 2014, and it shut down in September 2024.

Salesforce CDP, now known as Salesforce Data Cloud, was a customer data platform that went through several renamings — from Customer 360 Audiences to Salesforce CDP to Marketing Cloud Customer Data Platform — before arriving at its current identity.

Tapad is a New York City-based adtech firm, now part of Experian, whose core capability is using algorithmic analysis of internet and device data to determine whether multiple devices belong to a single user, enabling cross-device advertising and content delivery.

Viant is a programmatic advertising technology company that has been empowering marketers to create, execute, and measure advertising campaigns since 1999.

Yahoo Advertising is a unified digital ad platform that encompasses a programmatic demand-side platform (the Yahoo DSP) alongside native, search, and display advertising across Yahoo's owned and operated properties.

Zeotap is an enterprise software company whose core product is a Customer Data Platform built to consolidate customer data from disparate systems into unified profiles that can then be segmented and pushed out to marketing and advertising channels.

ActionIQ is an enterprise-grade customer data platform built primarily for large B2C organizations — including retail, financial services, media, and consumer brands — that sits between operational data warehouses and marketing activation tools, unifying customer profiles and enabling audience segmentation across channels such as email, paid media, and site personalization.

Acxiom is a data and technology company that solves complex challenges for leading brands and agencies by building the foundation for AI-powered marketing and decisioning.

Claritas is a data-driven marketing optimization company that unifies identity, AI, and proprietary consumer data to help marketers reach targeted audiences, personalize engagement, and drive measurable ROI.

Clearbit is a B2B marketing intelligence company, founded in 2014 and headquartered in San Francisco, that built its reputation on developer-friendly APIs for data enrichment and prospecting, as well as on its Reveal product, which uses IP-to-company matching to de-anonymize website traffic so revenue teams can identify which businesses are engaging with their digital properties.

Comcast Cable is Comcast Corporation's US cable and broadband business, selling internet, TV, phone and wireless service to consumers under the Xfinity brand.

Disney Audience Graph is a proprietary, fully in-house-built first-party data platform that powers audience targeting, planning, buying, and measurement capabilities for advertisers across Disney's portfolio of media properties.

Epsilon is a marketing technology firm acquired by Publicis Groupe in 2019, now operating as a central pillar of that global network with more than 8,000 employees across over 40 offices worldwide.

Epsilon Digital is a global marketing company, acquired by Publicis Groupe in 2019 in one of the largest deals in marketing history, positioning it at the center of Publicis operations worldwide, with over 8,000 employees across more than 40 offices.

Experian is a global data and technology company that powers opportunities for people and businesses around the world.

Adbrain was a cross-device identity resolution platform that helped advertisers track and target users across multiple devices, acquired by The Trade Desk in October 2017 to enhance its proprietary device graph capabilities.

Adform's identity-resolution layer that translates between first-party IDs (UID2, ID5, RampID, etc.) for cookieless addressability. Won AdExchanger Best Identity Tech award. Comparable to peer identity solutions ATDb tracks (UID2, ID5, RampID).

Adstra is a data connectivity platform that provides identity resolution, audience data, and data onboarding services for advertisers. The company helps brands connect first-party data with advertising platforms while maintaining privacy compliance.

Amperity is a leading customer data platform that helps enterprise brands unlock the full value of their customer relationships. The company's AI-powered platform unifies data from across the enterprise to create a single, shareable view of the customer.

Omnicom's data, technology, analytics & AI division; founded 2010. Internal capability (not marketer-facing brand) powering Omni — the cross-agency data platform.

Avocet provides identity resolution and data activation solutions for the advertising ecosystem, focusing on cookieless targeting and audience building. The platform helps advertisers and publishers navigate privacy-first advertising through alternative identity solutions.

Blockgraph is an identity resolution platform specifically designed for the TV industry, enabling secure data sharing between programmers, distributors, and advertisers. The platform uses blockchain technology to facilitate privacy-safe audience matching for TV advertising.

BlueConic is a customer data platform that helps marketers and data teams create personalized experiences across touchpoints and measure the impact.

Cognism is a B2B sales intelligence and lead generation platform providing GDPR-compliant contact data, intent signals, and prospecting tools for sales and marketing teams.

Audigent is a data activation, curation, and identity solutions platform that helps publishers and advertisers maximize the value of their first-party data.

Cross-device identity resolution company acquired by Oracle in May 2016. Provided device-graph capabilities for matching users across mobile, desktop, and connected TV. Integrated into Oracle Data Cloud. Discontinued with Oracle's 2024 advertising-business exit.

Synthetic ID + identity-resolution framework that bridges Disney's Audience Graph with third-party identifiers (UID2, LiveRamp RampID, Experian LUID, Yahoo ConnectID). Adopted by more than 6,500 brands by 2024. Privacy-compliant matching for advertiser-onboarded segments.

Equifax is a global data, analytics, and technology company best known as one of the three major consumer credit bureaus, increasingly leveraging its vast data assets for identity resolution, audience targeting, and marketing analytics in AdTech.

FullThrottle is an enterprise data technology company specializing in first-party data capture and identity resolution solutions designed for the post-cookie digital marketing landscape. The company addresses a critical challenge facing modern marketers: converting anonymous website visitors and digital audiences into actionable, privacy-compliant customer profiles without reliance on third-party cookies. Through sophisticated data matching algorithms and real-time identity resolution technol...

Hull.io was a customer data platform (CDP) that unified user data across tools and teams — acquired by MessageBird (now Bird) in March 2021 and subsequently absorbed into its omnichannel communications platform.

Mobile data marketplace with 3.1B device profiles. Includes Audience Explorer/Builder/Manager. Active.

LeadGenius is a B2B data and sales intelligence platform that combines AI technology with human research to provide custom lead generation and data enrichment services.

Narrative is a data commerce platform that enables companies to buy, sell, and access data through an automated marketplace and collaboration tools.

ActiveProspect is an Austin-based private SaaS company (founded 2004) providing consent-based marketing and lead-certification software (TrustedForm, LeadConduit). In Jan 2026 it acquired Verisk Marketing Solutions (Jornaya + Infutor) from Verisk, adding a consumer identity graph.

Adobe's enterprise data management platform (DMP) that unifies audience data from multiple sources to enable targeted advertising and personalized customer experiences.

Dun & Bradstreet is a global leader in business data and analytics, providing the D-U-N-S Number system and data-driven solutions that power B2B identity, risk assessment, and audience targeting across the AdTech ecosystem.

Ping Identity is an enterprise identity security company providing intelligent identity solutions that enable secure, seamless digital experiences across workforce and customer environments.

A customer data platform (CDP) and identity resolution provider that helps brands unify and activate customer data across marketing channels.

Verizon Communications is a major player in the AdTech ecosystem, leveraging its extensive telecommunications infrastructure and vast customer base to offer a range of digital advertising products and services. As a parent company, Verizon's key role in AdTech lies in its ownership of platforms such as Verizon Media, which includes prominent brands like Yahoo and AOL. These platforms provide a vast inventory of digital advertising space, enabling advertisers to reach a wide audience across va...

Adtech company offering supply-side and identity solutions for publishers.

Adfixus is an Australian-founded privacy-first identity and data collaboration platform designed for the post-cookie era, enabling publishers and advertisers to match audiences without sharing personal data. The platform uses a federated identity approach that keeps data within each party's environment while enabling addressable targeting across the open web. Adfixus is gaining traction in the APAC region as a cookieless identity solution for publishers and DSPs.

Auth0 is a leading identity-as-a-service (IDaaS) platform that provides authentication and authorization solutions for developers and enterprises, now operating as a subsidiary of Okta.

Civic Technologies is a leading provider of decentralized identity verification solutions, leveraging blockchain technology to empower users with control over their personal data. Their platform enables businesses to securely verify identities, streamline onboarding processes, and reduce fraud while enhancing user privacy.

Japan's leading data collaboration platform and privacy-safe identity consortium, enabling advertisers and publishers to activate first-party data in a cookieless environment.

Entrust — recorded in ATDb as the acquirer/parent of one or more AdTech companies (s375 lineage backfill).

European counterpart to Unified ID 2.0, a consented, email-based advertising identifier.

Personal-data infrastructure company founded by Michael Tiffany (ex-HUMAN/White Ops).

Gracenote is a leading entertainment data and metadata provider, powering content discovery, audience targeting, and personalization across TV, music, and sports platforms globally.