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Companies

4,253 companies in the AdTech ecosystem

Hearts & Science

Hearts & Science

Merged

Media Agency / Data-Driven Advertising

Hearts & Science was a data-driven media agency network launched by Omnicom Media Group in 2016. In August 2026 Omnicom Media combined it with Mediahub to form Hearts United.

Attribution & AnalyticsMarketing AgencyNew York, New York
Kinesso

Kinesso

Data-Driven Advertising & Performance Media

Kinesso is IPG's marketing intelligence and tech holding company formed October 2019. Powered by Acxiom data, Kinesso provides addressable activation, attribution, and audience tools across IPG agencies. In 2024-2026 absorbed Reprise + Matterkind operations into a unified data+tech offering. Now Omnicom-owned post-Nov 26, 2025 IPG acquisition.

Identity ResolutionData Management PlatformNew York, New York
M

Millennial Media

Acquired

Mobile Advertising

Millennial Media was a pioneering independent mobile advertising platform that became one of the largest mobile ad networks before being acquired by AOL in 2015.

Mobile Ad PlatformAd NetworkBaltimore, Maryland
G

Golin

Merged

Public Relations & Integrated Communications

Golin was a global public relations agency that came to Omnicom with its acquisition of Interpublic in November 2025. Omnicom merged Golin with Ketchum, and the combined agency launched as Golin Ketchum in June 2026.

Marketing AgencyChicago, Illinois
M

Monks

Acquired

Digital Marketing Services & Production

Monks (formerly Media.Monks) is a global digital production and marketing services company combining creative, data, and technology capabilities to help brands scale content and campaigns at speed.

Creative PlatformMarketing AgencyAmsterdam, North Holland
Qualtrics

Qualtrics

Experience Management / Market Research / Customer Intelligence

Qualtrics is an experience management platform that helps organizations collect, analyze, and act on customer, employee, product, and brand feedback data.

Data & AnalyticsMarketing AnalyticsProvo, Utah
ThePlatform

ThePlatform

Merged

Video Management & Publishing Technology

thePlatform was a Seattle company that built software for managing and publishing online video.

CTV PlatformConnected TV PlatformSeattle, Washington
S

Shutterstock, Inc.

Creative Content & Digital Asset Management

Public stock photography, video, and creative content marketplace (NYSE: SSTK). Founded 2003 by Jon Oringer. Major acquisitions: Pond5 (2022, $210M), Giphy (2023 from Meta, $53M), Envato (2024). Houses Shutterstock Custom (formerly Flashstock) and Shutterstock Studios divisions.

Creative PlatformMarketplace TechnologyNew York, New York
Sky AdSmart

Sky AdSmart

Addressable TV Advertising

Sky launched AdSmart, its addressable TV advertising product, in the UK in January 2014; it lets households watching the same programme see different ads in the same live break.

Demand Side Platform (DSP)Connected TV Platform
A

AdMeld

Defunct

Supply-Side Platform (SSP) / Programmatic Advertising

Pioneering SSP founded 2007. Google completed its $400M acquisition on December 6, 2011 and retired the product in late 2013. Featured prominently in the 2024 DOJ ad-tech antitrust trial as evidence of Google's anti-competitive acquisitions.

Supply Side Platform (SSP)Programmatic PlatformNew York, New York
DoorDash

DoorDash

Retail Media / Commerce Advertising

DoorDash is a leading on-demand food delivery platform that connects customers with local and national restaurants. The company's platform allows users to order food for delivery or pickup from a wide selection of restaurants in their local area.

Local AdvertisingPerformance MarketingSan Francisco, California
E

Emplifi

Social Media Marketing & Customer Experience Technology

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

Influencer MarketingSocial Media ManagementColumbus, Ohio
Informatica

Informatica

Data Management & Integration

Informatica is a leading provider of enterprise cloud data management solutions, offering a comprehensive suite of products and services to help organizations unlock the value of their data.

Customer Data PlatformIdentity ResolutionRedwood City, California
StackPath

StackPath

Defunct

CDN & Edge Computing Infrastructure

StackPath is a comprehensive edge computing platform provider that delivers integrated content delivery network (CDN) services, security solutions, and cloud infrastructure to businesses worldwide. The company operates a globally distributed network of edge locations designed to enable organizations to accelerate digital content delivery, secure applications, and optimize web performance with minimal latency. StackPath's platform architecture uniquely combines traditional CDN capabilities wit...

Dallas, Texas
Magento

Magento

E-Commerce Technology

An open-source e-commerce platform providing merchants with flexible shopping cart systems and control over their online store's look, content, and functionality.

Commerce TechnologyE-commerce MarketingAustin, Texas
M

MullenLowe

Merged

Creative Advertising & Integrated Marketing

MullenLowe is a global creative advertising agency network that delivers integrated marketing and communications solutions across traditional and digital channels.

Marketing AgencyBoston, Massachusetts
XR Extreme Reach

XR Extreme Reach

Ad Creative Management & Distribution

XR Extreme Reach runs a platform that brands, agencies and studios use to manage video ad creative, deliver ads to TV, streaming and digital outlets, and pay talent and production crews. The company rebranded from Extreme Reach to XR in January 2024.

Creative Management PlatformMarketing TechnologyDedham, Massachusetts
A

AddThis

Defunct

Social Sharing / Audience Data (defunct)

Social sharing-button and audience-data company that Oracle agreed to acquire on January 5, 2016 and used to feed Oracle Data Cloud audiences. Oracle shut AddThis down on May 31, 2023.

Customer Data PlatformData Management Platform
M

Marketing Cloud Personalization

Personalization & Customer Data Platforms

Salesforce Marketing Cloud component for 1:1 personalization across web, mobile, email, and in-app. Renamed from Salesforce Interaction Studio in the Marketing Cloud Winter '23 release (Nov 2022). The product originates from Evergage (acquired by Salesforce Feb 2020), which was rebranded to Interaction Studio, then to its current name.

Customer Data PlatformAI-Powered PlatformSan Francisco, California
TransUnion

TransUnion

Credit Reporting, Identity Verification, and Risk Management

TransUnion is a global information and insights company and one of the three major credit reporting agencies in the United States, alongside Equifax and Experian. Originally founded as a credit bureau, TransUnion has significantly expanded its capabilities beyond traditional credit reporting to become a comprehensive provider of identity resolution, fraud prevention, and risk management solutions. The company leverages vast consumer data assets and advanced analytics to serve businesses acros...

Data & AnalyticsIdentity ResolutionChicago, Illinois, United States, Illinois
T

TrueX

Rebranded

Video & CTV Advertising

TrueX was an engagement advertising platform that pioneered the 'engagement ad' format, allowing viewers to interact with a single ad in exchange for an ad-free content experience.

Connected TV PlatformVideo Advertising PlatformNew York, New York
Basis Technologies

Basis Technologies

Advertising Automation / Programmatic Advertising

Basis Technologies (formerly Centro) is an enterprise advertising automation platform that unifies programmatic, direct, search, and social media buying into a single, end-to-end workflow solution.

Creative Management PlatformDemand Side Platform (DSP)Chicago, Illinois
MediaMath

MediaMath

Acquired

Programmatic Advertising / Demand-Side Platform (DSP)

MediaMath was a pioneering demand-side platform (DSP) and programmatic advertising technology company that shut down operations in June 2023 after failing to secure new financing.

Demand Side Platform (DSP)Programmatic PlatformNew York, New York
Razorfish

Razorfish

Digital Agency/Marketing Services

A global digital agency specializing in experience design, technology, and marketing transformation, operating as part of Publicis Groupe.

E-commerce MarketingMarketing AgencySeattle, Washington