Ströer

Cologne, North Rhine-Westphalia, Germany · Founded 1990

5001-10000 employees · SAX

Sourced & current · updated Sep 21, 2026Website

Ströer is Germany's largest out-of-home media company and a major digital publisher, operating over 300,000 advertising touchpoints including digital OOH screens, online portals, and performance marketing networks across Germany. It runs a full-stack digital advertising business including its own SSP, data platform, and content portals reaching tens of millions of Germans monthly. Ströer's programmatic DOOH and digital media sales make it a dominant force in the German AdTech and media landscape.