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Lead DevelopmentFACT · 4/5•6 Oct '26•Via AdExchanger

PubX Raises $5M, Acquires Governance Startup Compliant

UK-based agentic AI ad startup PubX announced a $5 million Series A round led by Chicago Ventures and the acquisition of digital governance startup Compliant. The funding will support PubX's US expansion and integration of Compliant's data integrity and CTV quality signals into its agentic advertising platform. PubX, founded in 2020, originally focused on the sell side, but launched buyer agents this year. The platform enables direct agent-to-agent transactions without DSPs or SSPs, using the Ad Context Protocol (AdCP). Compliant's technology will enhance trust and transparency in agentic media buying, addressing concerns about halluncinations and brand safety. Jamie Barnard, Compliant's co-founder, will become PubX's president of global demand growth.

•PubX raised $5 million in a Series A round led by Chicago Ventures.
•PubX acquired digital governance startup Compliant.
•PubX's platform uses agent-to-agent transactions via Ad Context Protocol (AdCP).

Entities:pubX

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