Companies

Data-led media agency built for AT&T account 2016; specialist scale, smaller than OMD/PHD. Operates under Omnicom Media post-merger.

San Francisco creative agency, founded 2004, acquired by Deloitte Digital Feb-Mar 2016 (11th Deloitte Digital acquisition). Multi-Cannes-Lions winner. Operates under Heat brand within Deloitte Digital; opened NYC office post-acquisition. Sources: PR Newswire + The Drum + AdWeek.

Hedera Hashgraph is an enterprise-grade public distributed ledger technology platform that provides a fundamentally different approach to blockchain consensus mechanisms. Unlike traditional blockchain architectures, Hedera utilizes the patented Hashgraph consensus algorithm, which enables high-throughput transaction processing with low latency, fair transaction ordering, and enhanced security guarantees. The platform is designed to support a wide range of decentralized applications, including...

Heepsy is a specialized influencer marketing platform that empowers brands, agencies, and marketers to discover, analyze, and evaluate influencers across Instagram and YouTube. The platform combines advanced search functionality with comprehensive analytics capabilities, enabling users to filter potential influencer partners based on critical criteria including audience demographics, engagement rates, follower authenticity, geographic location, and niche categories. By providing transparent a...

Heimat Berlin is an independent German creative agency known for bold, culturally resonant advertising campaigns with a strong strategic and creative foundation.

Helium 10 is a comprehensive software suite for Amazon sellers, offering tools for product research, keyword optimization, listing management, and analytics — now operating under the Thrasio umbrella.

Indian-market social platform (regional Indian languages, multi-format), launched June 2018. ~40M users at peak. Banned by India June 2020 along with TikTok; India business officially shuttered January 2021.

Help Scout is a customer service software platform designed to help growing businesses deliver exceptional customer support experiences. The company provides a comprehensive suite of tools including shared inbox management, knowledge base software, and customer communication features that enable support teams to collaborate effectively while maintaining personalized interactions with customers. Help Scout's platform emphasizes simplicity and user experience, making it particularly popular amo...

Helpshift is an AI-powered customer service platform specializing in in-app and digital support, acquired by Keywords Studios in 2023 to serve mobile gaming and consumer app companies.

Asia-Pacific digital media network acquired by Publicis Groupe for influencer + creator-economy capabilities.

HERE Technologies is a global leader in location data and mapping technology, providing precise geospatial intelligence and location services to enterprises, automotive OEMs, and developers worldwide.

Hevo Data is a no-code data pipeline platform that helps businesses integrate data from various sources into their data warehouses or destinations. It automates the process of data extraction, transformation, and loading (ETL/ELT), enabling data teams to focus on analytics rather than pipeline maintenance.

Hex Technologies is a collaborative, AI-powered data-analytics workspace (hex.tech) that unifies SQL, Python, R and agentic AI for data teams. Founded 2020, San Francisco. (Distinct from WPP's creative studio HEX.)

HEX is WPP's AI-driven creative studio — part creative production studio, part R&D lab, part consultancy — launched June 2026 within WPP Production, staffed by ~50 Gen-Z creative technologists. (Distinct from Hex Technologies, the data-analytics company.)

Hexagon is a global leader in digital reality solutions, providing an integrated portfolio of sensor technologies, software platforms, and autonomous systems that enable organizations to capture, measure, and visualize physical assets and processes with unprecedented accuracy. The company serves diverse industries including manufacturing, infrastructure, public safety, mining, and geospatial applications, delivering solutions that bridge the physical and digital worlds through advanced measur...

Hibu is a digital marketing solutions provider focused on helping small and medium-sized businesses with online advertising, website development, and local search marketing.

Highcharts is a leading provider of JavaScript-based charting libraries that enables developers and organizations to create interactive, visually compelling data visualizations for web and mobile applications. Founded in Norway, the company has established itself as a trusted solution in the data visualization space, serving developers across industries ranging from finance and healthcare to media and e-commerce. Their flagship product offers a comprehensive suite of chart types including lin...

Highspot is a sales enablement platform that helps companies improve sales performance by empowering sales teams with the content, guidance, and training they need to engage buyers effectively. It combines content management, sales playbooks, training & coaching, and analytics into a single platform to drive consistent sales execution and achieve revenue goals.

Hightouch is a reverse ETL (extract, transform, load) platform that helps companies sync their data from their data warehouses to their marketing, sales, and customer support tools. This enables real-time data synchronization and improves operational efficiency by automating data flows.

Hill & Knowlton was a major WPP PR agency dating to 1927. Merged with BCW on July 1, 2024 to form Burson. Hill & Knowlton brand retired post-merger.

HilltopAds is a global advertising network specializing in popunder, display, and video advertising with a focus on high-traffic publishers and performance-driven campaigns.

HilltopAds is a global advertising network specializing in popunder, display, and video ads with a focus on high-traffic publishers and performance-based campaigns.

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

Hippo Video is a comprehensive video creation and marketing platform designed to help businesses leverage video content for sales, marketing, and customer support. The platform enables users to create, edit, personalize, and distribute video content at scale without requiring advanced technical skills. Founded to address the growing demand for video communication in business contexts, Hippo Video provides tools for screen recording, video editing, personalized video messaging, and video analy...