The inaugural Hamburg Sustainability Conference (HSC) gathered approximately 1,600 participants from over 100 countries to address critical global challenges, including climate change and sustainable development. Keynote speakers, including German Chancellor Olaf Scholz and UNDP Administrator Achim Steiner, emphasized the necessity of international cooperation to achieve the 17 Sustainable Development Goals (SDGs) and tackle issues such as inequality and poverty exacerbated by global conflicts. Vietnamese Deputy Prime Minister Ho Duc Phoc highlighted the importance of leveraging technology and fostering partnerships for green transformation, while also addressing debt sustainability and equitable global governance. The conference featured discussions on sustainable practices across various sectors, including hydrogen supply chains and battery production. Organizers aim for the HSC to become a pivotal forum for sustainability initiatives, akin to the Munich Security Conference for foreign policy. Attendees included leaders from the Global South and representatives from civil society, academia, and the private sector, all seeking to build alliances for a sustainable future.