pubX, an end-to-end advertising marketplace built on transparent, data-driven connections, has closed a $5.0M Series A funding round. The capital infusion comes from Chicago Ventures, backing pubX's mission to deliver more efficient, higher-value programmatic outcomes for both publishers and advertisers.
The company, which leverages Agentic technology to drive results at scale, has been trusted for five years to build and deploy machine learning technology for publishers. This foundation, separating it from newer entrants, allows pubX to offer a marketplace where first-party data becomes a competitive advantage for publishers and buying agents autonomously evaluate premium inventory for advertisers.

















