Roylinx is a TU Delft spin-off developing 100% bio-based, plastic-free multifunctional materials made from agricultural by-products such as nut shells and sawdust. Our materials are 3D-printable, moldable, and fully compostable, providing sustainable, high-performance alternatives to plastics and synthetic resins. We bridge research and industry by scaling innovation from laboratory development to industrial production, enabling new circular material solutions for construction, design, and urban applications. Within the DUT framework, Roylinx seeks partnerships with municipalities, research institutions, and companies to demonstrate and integrate bio-based materials into real urban environments; supporting the transition toward climate-neutral, circular, and resource-efficient cities.