With „Hamburg räumt auf!“ (Hamburg Cleans Up!), Germany’s largest clean-up campaign, we support Hamburg’s municipal cleaning service in the strategic and creative development of its brand. From communication strategy and campaign concept to social media, content, website, and media planning, we create an activation that strengthens the community and motivates more and more people to participate.

The result is a high-profile communication platform that mobilizes over 100,000 Hamburg residents every year. With its broad reach, social relevance, and creative execution, „Hamburg räumt auf!“ (Hamburg Cleans Up!) is now one of Germany’s largest citywide cleanup campaigns. For this campaign, mattrs, in collaboration with Hamburg’s municipal cleaning service, received the German Brand Award 2026. This award recognises the successful activation of over 100,000 people for environmental engagement and makes „Hamburg räumt auf!“ an outstanding example of impact-oriented brand communication in public spaces.