We are zwoelfstein
Where sport, media, communication
& partnerships
come together.
Founded in 2020 by Jonas Onstein in Düsseldorf. We advise brands and personalities in sport — from strategy through to execution. Our "story-first" principle: the story has to be true. That's the only way to build communities that stay, and brands that grow. Our network spans from national sports personalities to global brand partners.
10+
Years of Experience
12+
Talents Represented
20+
Brands & Partners
2M+
Portfolio Reach
