Companies

H2O.ai is an enterprise AI cloud platform company that provides open-source and commercial machine learning solutions, including automated machine learning (AutoML) capabilities.

Habu was a leading data clean room platform acquired by LiveRamp in 2024 for $200M, enabling privacy-safe data collaboration across the advertising ecosystem.

Hakuhodo is Japan's second-largest advertising agency, offering integrated marketing, media planning, and creative services with a strong Asia-Pacific presence.

Japanese advertising and marketing holding company listed on the Tokyo Stock Exchange (TSE: 2433). Formed October 1, 2003 through the integration of Hakuhodo, Daiko Advertising, and Yomiko Advertising — the first major Japanese ad-agency holdco integration, aimed at challenging Dentsu's dominance. The "DY" = Daiko + Yomiko. Japan's #2 advertising organization with FY2025 (year ended Mar 31 2025) consolidated revenue of ¥953.3 billion and 29,386 employees across 453 subsidiaries in 30+ countries. Headquartered in Akasaka, Minato, Tokyo. Sources: Wikipedia + HDYH official integrated-report PDF + Statista.

The Hakuhodo DY group's centralized media-buying, planning, and sports/events unit, formed December 1, 2003 to consolidate media-purchasing operations previously run independently by Hakuhodo, Daiko, and Yomiko. Operates Japan's #2 media-investment platform after Dentsu Media, managing TV, print, OOH, and digital inventory. Tokyo HQ, ~750 employees. Sources: Wikipedia + ZoomInfo.

Established April 1, 2024 by merging DAC (D.A.Consortium) and IREP, Hakuhodo DY ONE is the group's designated digital-marketing core under its FY2024 medium-term plan. ~3,200 staff in Tokyo deliver programmatic, performance, search, and data-driven services. Co-leads the H+ APAC network with Hakuhodo Inc. Sources: HDYH press release + Marketing-Interactive + DAC press.

HappyFox is a leading provider of customer support and help desk software solutions designed to streamline customer service operations for businesses of all sizes. Founded with a mission to simplify customer support management, the company offers a comprehensive suite of tools including advanced ticketing systems, live chat capabilities, knowledge base management, and intelligent customer service automation. These solutions enable organizations to deliver exceptional customer experiences acro...

Harmonic is a video delivery infrastructure company providing software and hardware solutions for cable operators, satellite, telco, and media companies to deliver broadcast and OTT video services.

Mobile-first market research firm. Formed 2017 when Stagwell bought Nielsen mobile-research assets.

Harte-Hanks is a global customer experience company delivering data-driven marketing services, direct mail, fulfillment, and customer care solutions to enterprise brands.

HashiCorp provides infrastructure automation software including Terraform (infrastructure-as-code), Vault (secrets management), Consul (service networking), Nomad (workload orchestration), and Boundary (secure remote access). Acquired by IBM February 27, 2025 for $6.4 billion. Folded into IBM's hybrid cloud + Red Hat ecosystem.

Hashoff was an AI-powered influencer marketing platform that connected brands with social media creators across major platforms like Instagram, YouTube, and Snapchat.

Havas is one of the world's largest global communications and advertising groups, offering integrated media, creative, and health communications services across 100+ countries.

Havas Creative is a global creative agency network within the Havas Group, delivering integrated brand communications, advertising campaigns, and creative strategy across all media channels.

Havas Data is the data and analytics division of Havas Group, providing data-driven marketing intelligence and audience solutions to power smarter media and creative decisions.

Direct-response and performance-marketing agency within the Havas Creative Network. Offices in Carlsbad, Boston, and Portland.

PR agency within the Havas Creative Network. Offices in El Segundo, New York, and San Diego.

Havas's health, pharma, and wellness communications sub-network. Restructured 2024-25 into three operating sub-units: Havas Life, Havas Lynx, and Jacques (named after Jacques Séguéla).

Global health communications agency within the Havas Health Network.

Distinct creative agency within Havas Creative Network; standalone brand identity (lon.havas.com).

Digital health brand-transformation agency within the Havas Health Network. Strengthened with new North America leadership 2025.

Havas Media is the global media network of Havas Group, offering integrated media planning, buying, and data-driven advertising solutions across 140+ countries.

Sports, sponsorship, gaming, and entertainment-marketing arm within Havas Media. Rebranded from 'Havas Sports & Entertainment' to 'Havas Play'.