Participated · Seed · Feb 2026

Founded in 2020 in Gironde, France, Dionymer develops and manufactures PolyHydroxyAlcanoates (PHA) derived from biodéchets sourced from collective catering outlets. These biopolymers serve as sustainable, fully biodegradable alternatives to the 99 % petrochemical polymers currently used in cosmetics, plastics, and paints. By valorising organic waste, the startup targets a share of the 400-million-tonne global polymer market while reducing carbon emissions and microplastic pollution. To date the company has focused on scaling its proprietary production process; the new capital will finance its transition from pure production to active commercial sales. Management emphasises that the forthcoming phase will include market entry and broader industrial deployment. Dionymer’s technology positions it for both environmental impact and regulatory tailwinds as industries seek greener materials, though no revenue or customer figures have yet been disclosed. Earlier seed financings totalled €2.5 million, and the firm is now poised to accelerate go-to-market execution with expanded manufacturing capacity.