pubX builds agent-to-agent infrastructure for advertising: buyer and seller agents that plan, buy, sell and optimize media directly, without routing through a traditional DSP or SSP. Founded in 2020 and headquartered in London, the company started on the publisher side, spending five years helping publishers price and sell inventory, and now serves brands and agencies with buyer agents built on the open Ad Context Protocol (AdCP). In October 2026 it acquired media quality and governance company Compliant, whose data integrity and CTV quality signals are being integrated into pubX's agents.
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Oct 6, 2026
Latest raise
Funding activity · 1 round
Oct 6, 2026
$5M
Series A
Led by Chicago Ventures
Article coming soon.
Pricing
Public hubs orient you on the raise. Paid plans unlock live AI adoption signals across your market.
For individuals and small teams getting started with AI buyer intelligence.
$149
/month
Features
For outbound teams and agencies that need more coverage and faster signal cadence.
$249
/month
Features
Act on this raise
Funding is the starting point. VeilStrat shows whether capital is showing up as hiring, tools, and web activity you can sell into.
