Smartly integrates Horizon Media’s Blu API for direct audience activation

This partnership marks a shift from audience data as a planning insight to a functional infrastructure layer. By automating the transfer of proprietary segments via API, Horizon and Smartly eliminate the manual 'interpretation drift' that often occurs between agency strategy and technical trafficking. For the streaming sector, it signals a deeper convergence where CTV inventory is managed with the same data-driven precision as social media. Strategists should note that as major agencies like Horizon open their 'HorizonOS' stacks via APIs, independent ad tech vendors are increasingly competing on their ability to act as the direct execution plumbing for proprietary agency intelligence.

The Smartly-Horizon integration follows a parallel move by Teads and Havas Media Network, which implemented a similar API-based connection between the Havas Converged.AI platform and Teads Ad Manager in June 2026. Per reporting from Radio & Television Business Report (June 2026), that deal went live across six markets, including the U.S. and UK, to eliminate manual audience rebuilds. These developments highlight a broader industry trend toward 'open' agency ecosystems. Horizon Media Holdings recently debuted HorizonOS, an architecture designed to counter the closed, automation-first stacks of larger holding companies by prioritizing interoperability through published APIs and SDKs.

Simultaneously, Smartly has aggressively expanded its CTV capabilities throughout 2026. In June 2026, the company integrated with the Roku Ads API to allow performance marketers to manage TV campaigns using social-style workflows, following a March 2024 connection to the Amazon DSP. Per Business Wire (May 2026), Smartly also finalized its acquisition of INCRMNTAL, an AI-powered measurement platform, to bolster its ability to prove sales lift across these fragmented channels. These moves align with findings from Smartly’s 2026 Digital Trends Report, which indicated that nearly 72% of marketers still struggle to adapt creative assets between social and CTV environments due to structural workflow friction.

Horizon’s broader AI strategy, detailed in PR Newswire (June 2026), includes an 'agentic integration layer' within its Blu platform. This layer uses agents powered by Google Gemini to facilitate real-time decisioning across publishers like Disney, Fox, and NBCUniversal. By positioning Smartly as a primary SaaS partner within this layer, Horizon is scaling its proprietary consumer decision-making models directly into the buying workflows of its global client base, which includes brands like SharkNinja and Tropical Smoothie Cafe.