Horizon Media is the largest independent media agency in the United States, founded in 1989 by Bill Koenigsberg and headquartered at 75 Varick Street in New York with offices in Los Angeles and Toronto. The agency employs roughly 2,300+ people, is ranked the third largest US media agency by COMvergence, and manages an estimated $8.7 billion in billings. Horizon operates a portfolio of specialty units (Horizon Next for performance, Blue Hour Studios for social/creator, Night Market for retail media, Scout Sports for sponsorship via Horizon Sports & Experiences, and the WHY Group for cultural insights) and runs a proprietary data and AI stack anchored by the Blu platform. In 2025 Horizon formed Horizon Global, a 50/50 US joint venture with Havas positioned at roughly $20 billion in combined billings, merging Blu with Havas Converged into a shared platform branded BluConverged, and is also building Horizon OS (Open Sphere) as an orchestration layer over the programmatic ad-tech stack. Horizon Media does not publish any public developer APIs, OpenAPI specifications, SDKs, or external developer portals, and its GitHub organization is private. All platforms documented here are internal/client-facing proprietary systems rather than open developer APIs.
Horizon Media is profiled on the APIs.io network. Tagged areas include Advertising, Media Agency, Media Planning, Media Buying, and Programmatic.
Horizon Media’s developer surface includes GitHub presence and 38 more developer resources.
aid: horizon-media
name: Horizon Media
description: Horizon Media is the largest independent media agency in the United States, founded in 1989 by Bill Koenigsberg
and headquartered at 75 Varick Street in New York with offices in Los Angeles and Toronto. The agency employs roughly 2,300+
people, is ranked the third largest US media agency by COMvergence, and manages an estimated $8.7 billion in billings. Horizon
operates a portfolio of specialty units (Horizon Next for performance, Blue Hour Studios for social/creator, Night Market
for retail media, Scout Sports for sponsorship via Horizon Sports & Experiences, and the WHY Group for cultural insights)
and runs a proprietary data and AI stack anchored by the Blu platform. In 2025 Horizon formed Horizon Global, a 50/50 US
joint venture with Havas positioned at roughly $20 billion in combined billings, merging Blu with Havas Converged into a
shared platform branded BluConverged, and is also building Horizon OS (Open Sphere) as an orchestration layer over the programmatic
ad-tech stack. Horizon Media does not publish any public developer APIs, OpenAPI specifications, SDKs, or external developer
portals, and its GitHub organization is private. All platforms documented here are internal/client-facing proprietary systems
rather than open developer APIs.
type: Index
accessModel:
pricing: unknown
onboarding: unknown
trial: false
try_now: false
public: false
label: Unknown
confidence: low
source: []
generated: '2026-07-22'
method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/horizon-media.png
url: https://raw.githubusercontent.com/api-evangelist/horizon-media/refs/heads/main/apis.yml
humanURL: https://www.horizonmedia.com/
created: '2025-03-01'
modified: '2026-05-23'
specificationVersion: '0.20'
tags:
- Advertising
- Media Agency
- Media Planning
- Media Buying
- Programmatic
- Retail Media
- Sports Marketing
- Social Media
- Influencer Marketing
- Cultural Intelligence
- Data Platform
- AI Platform
- MarTech
- AdTech
- Independent Agency
apis: []
common:
- type: TrustCenter
url: security/horizon-media-trust-center.yml
- type: DomainSecurity
url: security/horizon-media-domain-security.yml
- type: Website
url: https://www.horizonmedia.com/
- type: Independence
url: https://www.horizonmedia.com/independence
- type: Innovation
url: https://www.horizonmedia.com/innovation
- type: Integrity
url: https://www.horizonmedia.com/integrity
- type: Inclusion
url: https://www.horizonmedia.com/inclusion
- type: Intentionality
url: https://www.horizonmedia.com/intentionality
- type: Insights
url: https://www.horizonmedia.com/insights
- type: Contact
url: https://www.horizonmedia.com/interested
- type: Sitemap
url: https://www.horizonmedia.com/sitemap.xml
- type: LinkedIn
url: https://www.linkedin.com/company/horizon-media
- type: GitHub
url: https://github.com/horizonmedia
description: Horizon Media maintains a private GitHub organization with no public repositories, no public members, and ~30
followers.
- type: ProprietaryPlatform
title: Blu
url: https://www.horizonmedia.com/innovation
description: Horizon's flagship connected marketing and AI platform. Originally launched in 2020 as an advanced data platform
with machine learning, Blu has since evolved into a "transparent business consultancy" platform that analyzes business
goals through a media lens, builds and analyzes custom audiences, runs competitive analysis, and answers strategic business
questions. Architecturally Blu organizes data in a flat lattice structure for AI access, lists data sources and model
details for transparency, operates inside each client's own cloud and data walls, taps multiple LLMs, and uses TransUnion
data as a "data spine." Creative assembly, scoring, and generation are in pilot via APIs, MCPs, and agentic options.
- type: ProprietaryPlatform
title: BluConverged
url: https://www.horizonmedia.com/innovation
description: Joint AI and data platform created by merging Horizon's Blu with Havas's Converged marketing operating system,
powering the Horizon Global JV.
- type: ProprietaryPlatform
title: Horizon OS (Open Sphere)
url: https://www.horizonmedia.com/innovation
description: Ad-tech orchestration and intelligence layer that sits above the programmatic stack, dynamically routing ad
spend across DSPs, SSPs, verification, data, and measurement partners (Trade Desk, DV360, Amazon, Clearline, etc.) based
on real-time performance signals. Horizon has issued RFIs to 200+ potential partners and is in active pilot integration.
Monetization is on decision-making intelligence rather than inventory markups.
- type: ProprietaryPlatform
title: Swell Audience Network
url: https://digiday.com/media-buying/horizons-blue-hour-social-shop-partners-with-platform-key-to-launch-talent-management-tool/
description: Talent and audience management platform built by Blue Hour Studios with Platform Key, providing programmatic
audience segmentation, demographics, geolocation, and third-party analytics across health, wellness, fashion, sports,
and music verticals.
- type: ProprietaryPlatform
title: Cogent
url: https://www.horizonmedia.com/innovation
description: Horizon's proprietary data and intelligence platform brand, sitting alongside Blu in the agency's data and
analytics stack.
- type: ProprietaryPlatform
title: Big
url: https://www.horizonmedia.com/innovation
description: Horizon's proprietary creative platform brand used for creative development and optimization within the agency's
tech stack.
- type: ProprietaryPlatform
title: Wave
url: https://www.horizonmedia.com/innovation
description: Horizon's cultural insights platform brand, associated with the WHY Group cultural intelligence practice that
publishes work such as the annual Subculture Field Guide.
- type: Division
title: Horizon Next
url: https://www.horizonmedia.com/insights/horizon-next-partners-with-artsai-on-proprietary-cross-platform-audio-measurement-framework
description: Horizon Media's performance marketing unit, which has built a proprietary cross-platform audio measurement
framework in partnership with ArtsAI.
- type: Division
title: Blue Hour Studios
url: https://digiday.com/media-buying/horizons-blue-hour-social-shop-partners-with-platform-key-to-launch-talent-management-tool/
description: Horizon's social content and creator-economy division, founded in 2019 and led by Sarah Bachman. Operates the
Swell Audience Network talent management platform via partnership with Platform Key.
- type: Division
title: Night Market
url: https://www.horizonmedia.com/insights/night-market-introduces-first-ever-standardized-measurement-across-retail-media-networks-allowing-real-time-campaign-performance-assessment
description: Horizon's retail media practice, which introduced a standardized measurement framework across retail media
networks for real-time campaign performance assessment.
- type: Division
title: Horizon Sports & Experiences (HS&E)
url: https://www.horizonmedia.com/
description: Horizon Media's sports, entertainment, and live-experiences holding group, parent of Scout Sports & Entertainment
and related sponsorship and partnerships brands.
- type: Division
title: Scout Sports & Entertainment
url: https://www.horizonmedia.com/
description: Sponsorship and sports-marketing practice operating under Horizon Sports & Experiences.
- type: Division
title: WHY Group
url: https://www.horizonmedia.com/insights/passion-over-age-the-2024-subculture-field-guide-urges-marketers-to-embrace-niche-over-the-norm
description: Horizon's strategy and cultural-intelligence practice; publisher of the annual Subculture Field Guide and ongoing
cultural deep dives.
- type: JointVenture
title: Horizon Global
url: https://digiday.com/marketing/why-horizon-and-havas-are-joining-forces/
description: 50/50 US joint venture between Horizon Media and Havas announced in September 2025, focused exclusively on
US operations for global accounts. Bob Lord serves as interim CEO, Renata Spackova as global COO, with a board including
Bill Koenigsberg and Yannick Bolloré. Expected to command roughly $20 billion in annual billings and runs on the combined
BluConverged platform.
- type: Leadership
title: Bill Koenigsberg
url: https://www.horizonmedia.com/
description: Founder, CEO and Chairman of Horizon Media (founded 1989).
- type: Leadership
title: Bob Lord
url: https://www.horizonmedia.com/
description: President of Horizon Holdings and interim CEO of the Horizon Global JV with Havas.
- type: Leadership
title: Domenic Venuto
url: https://www.horizonmedia.com/insights/horizon-media-taps-tech-titan-domenic-venuto-as-evp-chief-of-product-data
description: EVP, Chief of Product & Data, leading Horizon's product and data org.
- type: Leadership
title: Tim Rich
url: https://www.horizonmedia.com/insights/horizon-media-announces-tim-rich-as-new-head-of-ai-solutions
description: Head of AI Solutions.
- type: Partner
title: TransUnion
url: https://www.horizonmedia.com/innovation
description: Identity and audience data spine underlying the Blu platform.
- type: Partner
title: Platform Key
url: https://digiday.com/media-buying/horizons-blue-hour-social-shop-partners-with-platform-key-to-launch-talent-management-tool/
description: Talent platform partner powering Blue Hour Studios' Swell Audience Network.
- type: Partner
title: ArtsAI
url: https://www.horizonmedia.com/insights/horizon-next-partners-with-artsai-on-proprietary-cross-platform-audio-measurement-framework
description: Measurement partner for Horizon Next's cross-platform audio measurement framework.
- type: Partner
title: Havas
url: https://digiday.com/marketing/why-horizon-and-havas-are-joining-forces/
description: Joint-venture partner in the Horizon Global US JV.
- type: Press
title: Horizon and Havas joint venture
url: https://digiday.com/marketing/why-horizon-and-havas-are-joining-forces/
- type: Press
title: Blu AI platform as transparent business consultancy
url: https://digiday.com/marketing/horizons-blu-ai-platform-focuses-on-being-a-transparent-business-consultancy/
- type: Press
title: Horizon OS (Open Sphere) ad-tech orchestration platform
url: https://digiday.com/future-of-tv-briefing/future-of-marketing-briefing-horizon-media-is-building-a-platform-to-orchestrate-ad-tech-from-a-single-command-center/
- type: Press
title: Horizon Global red-ocean differentiation
url: https://digiday.com/marketing/media-buying-briefing-how-horizon-and-havas-jv-aims-to-distinguish-itself-in-a-red-ocean/
maintainers:
- FN: API Evangelist
url: https://apievangelist.com
email: info@apievangelist.com
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