pubX Raises $5M Series A

pubX, with dual operations in New York and London, a company building agent-to-agent advertising infrastructure, has announced a $5 million Series A funding round. This new capital will support the company as it scales its operations in the United States and continues to integrate its recently acquired media quality and governance platform, Compliant.

Investors

The funding round was led by Chicago Ventures. There were no additional investors named in the announcement.

pubX Use of Funds

pubX plans to utilize the $5 million investment to fuel its expansion within the United States, build out its demand-side business to better serve brands and agencies, and continue the technical development of its buyer and seller agents built on the Ad Context Protocol. The funds will also support the integration of media quality signals from its newly acquired subsidiary, Compliant, across the broader platform.

About pubX

pubX was founded by Andrew Mole and Alex Rosen to address inefficiencies in digital advertising through agent-to-agent infrastructure. The company develops software agents that plan, buy, sell, and optimize advertising across channels. These agents are designed to operate under client-defined rules, ensuring trust, transparency, and accountability throughout the media transaction process from brief to reporting.

Funding Details

Company Website: https://pubx.ai

Company: pubX
Raised: $5M
Round: Series A
Funding Date: October 6, 2026
Lead Investor: Chicago Ventures
Company Website: www.pubx.ai
Software Category: AdTech
Source: https://www.prnewswire.com/news-releases/pubx-raises-5m-series-a-led-by-chicago-ventures-and-acquires-compliant-to-build-agent-to-agent-advertising-infrastructure-from-the-ground-up-302899056.html