Stagwell launches AI-powered Curate marketplace to streamline programmatic supply chain

The launch signals a significant shift as agency holding companies move to reclaim control over the ad tech stack and reduce the 'middleman' tax. By centralizing preferred supply, Stagwell is attempting to solve fragmentation and execution errors that drain client budgets in the current programmatic ecosystem. This move mirrors a broader industry trend where buyers seek direct paths to premium inventory to avoid auction duplication. For the streaming industry, this means more direct agency oversight of CTV and digital video buys, potentially squeezing traditional ad tech intermediaries that fail to provide unique value beyond basic bid facilitation. Success depends on whether these internal marketplaces can truly deliver better performance than existing open-market DSP algorithms.

The launch of Stagwell Curate follows a period of heavy consolidation and infrastructure building within the agency landscape. Per MediaPost in May 2026, Publicis Groupe entered an agreement to acquire data collaboration giant LiveRamp for approximately $2.2 billion. This move was explicitly framed as a way to enhance 'agentic' media capabilities and identity resolution, allowing Publicis to build proprietary data assets and AI-driven planning tools. Similar to Stagwell’s strategy, Publicis aims to integrate these capabilities directly into its existing stack, including the Epsilon identity platform and Sapient systems, to offer a more unified alternative to third-party ad tech providers.

Simultaneously, The Trade Desk has continued to expand its OpenPath initiative, which connects the demand-side platform directly to premium publisher inventory. According to Digiday reporting from April 2026, Stagwell previously chose to partner with The Trade Desk to embed AI agents into its stack using the Koa software framework. While Stagwell’s latest marketplace launch appears to compete for supply chain leverage, the agency maintains that it is not looking to replace dominant DSPs like Google or The Trade Desk. Instead, it seeks to apply intelligence upstream—before the bid is even placed.

Curation is becoming a standard industry mechanism to address waste. According to a 2026 Digital Trends report by Experian, over 66% of open-exchange ad spend now flows through curated private marketplaces. This trend is driven by the need for transparency and efficiency in a privacy-first environment. Agencies are increasingly moving past static publisher lists toward dynamic curation, where they score and filter inventory from a defined set of SSPs in real-time. This structural change in the programmatic hierarchy suggests that the 'middle of the middle' layers of ad tech are under increasing pressure to justify their fees as agencies and platforms tighten their grip on the supply path.