Weber Shandwick, the flagship PR agency of Interpublic Group, has signed a multimillion-dollar deal with Google to build a custom AI platform, according to Axios.

The agreement hands the Interpublic-owned agency a bespoke artificial intelligence build backed by one of the largest hyperscalers in the market. The dollar value sits in the "multimillion-dollar" range per Axios' reporting — a figure that puts it well above pilot spend but short of the nine-figure technology overhauls that have marked the largest holding-company platform plays.

What's known so far

The platform is described as custom, not a license of Google's off-the-shelf enterprise AI stack. That distinction matters: a bespoke build typically signals embedded workflow integration across an agency's operations, not a chat-with-your-documents tool bolted on top of Workspace.

Neither Weber Shandwick nor Google has publicly disclosed the term length, the specific products involved, or the dollar figure. The report also does not name the executives who brokered the deal or identify which Google unit is the contracting party.

Why a custom build — and why Google

Custom AI platforms are now the leading edge of the holding-company tech race. The Interpublic, WPP, Omnicom and Publicis stacks have each moved from licensed-model experimentation toward owned platforms tuned to agency workflows.

Google's involvement narrows the field of credible hyperscaler partners. Microsoft and OpenAI remain the default pairing for many agency builds, particularly those tied to Microsoft 365 estates. A Google build leans into Google Cloud, Vertex AI and Google's foundation models — and, increasingly, into the Gemini product family.

For an agency of Weber's scale, the partner choice shapes everything downstream: data residency, security review, model fine-tuning access and the contractual posture around training data.

What a custom platform typically covers

A custom platform, in trade-press shorthand, usually spans four buckets:

• Workflow tooling for media monitoring, drafting and analytics
• Internal knowledge search across client files and past campaigns
• Client-facing dashboards and reporting
• Governance, IP and security review sized to enterprise procurement

The exact mix for the Weber build has not been disclosed.

Where it sits in the agency AI race

The Interpublic flagship joins a crowded field of bespoke agency AI builds. Publicis' Marcel, WPP's production stack and Omnicom's Omni Assist all sit in this category. Weber Shandwick's Google-tied custom platform enters the field as the most recent publicly reported entry.

For practitioners, the takeaway is operational, not promotional. A custom platform changes the daily toolkit: what junior staff can draft, what account leads can search, what creative teams can produce. The questions now are rollout speed, access tiers, and how the tool gets priced into client scopes.

What's still missing

Axios' item leaves several blanks:

• Contract length
• Specific dollar figure
• Named executives on the record
• Whether the platform will be shared with other IPG agencies
• Whether Google Cloud or another Google unit is the contracting party

Until those details land, the deal reads as a marquee holding-company AI partnership — and a sign that the custom-platform phase of agency AI procurement has moved from pilot to signed contract.