pubX raises $5M in Series A funding led by Chicago Ventures to expand US operations and develop its agent-to-agent advertising infrastructure platform.
PRIVATEOct 06, 2026
Amount Raised
$5 Million
Round Type
Series A
Greater LondonAdvertisingMarketing
Investors
Chicago Ventures
Description
pubX, a London-based provider of agent-to-agent infrastructure for advertising, raised $5M in Series A funding led by Chicago Ventures. The company plans to use the funds to support its expansion in the United States and build out its demand-side business serving brands and agencies. pubX's platform enables brands, agencies, and publishers to plan, buy, sell, and optimize advertising directly through buyer and seller agents built on the open Ad Context Protocol (AdCP). Led by CEO Andrew Mole and CTO Alex Rosen, the company focuses on incorporating governance checks, reasoned decisions, and media quality signals into its infrastructure.
Company Information
Company
pubX
Location
Greater London, England, United Kingdom
About
pubX is a London-based provider of agent-to-agent infrastructure for advertising. The platform enables brands, agencies, and publishers to plan, buy, sell, and optimize advertising directly through buyer and seller agents. Built on the open Ad Context Protocol (AdCP), it incorporates governance checks, reasoned and auditable decisions, and media quality signals across all channels.
Fundz sees it the moment pubX raises, hires an exec or expands, usually minutes after it happens, and tells you who to reach.
Greater LondonAdvertisingMarketing