Companies
4,253 companies in the AdTech ecosystem
Hearts & Science
MergedMedia 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.
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.
Millennial Media
AcquiredMobile 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.
Golin
MergedPublic 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.
Monks
AcquiredDigital 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.
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.
ThePlatform
MergedVideo Management & Publishing Technology
thePlatform was a Seattle company that built software for managing and publishing online video.
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.
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.
AdMeld
DefunctSupply-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.
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.
Emplifi
Social Media Marketing & Customer Experience Technology
Emplifi — recorded in ATDb as the acquirer/parent of one or more AdTech companies (s375 lineage backfill).
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.
StackPath
DefunctCDN & 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...
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.
MullenLowe
MergedCreative Advertising & Integrated Marketing
MullenLowe is a global creative advertising agency network that delivers integrated marketing and communications solutions across traditional and digital channels.
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.
AddThis
DefunctSocial 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.
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.
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...
TrueX
RebrandedVideo & 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.
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.
MediaMath
AcquiredProgrammatic 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.
Razorfish
Digital Agency/Marketing Services
A global digital agency specializing in experience design, technology, and marketing transformation, operating as part of Publicis Groupe.