Sustainable bioeconomy and circular economy are more and more connected to sustainable development goals. This requires engaging all the different stakeholders to promote peaceful and inclusive societies for sustainable development. Therefore, information access is a key challenge related to all the sustainable development goals. This article considers ideas, approaches and concepts related to sharing knowledge on Bioeconomy and collaborative ecosystems based on an ontology, aiming to facilitate information and services access. This ontology has been defined starting from the experience of the BIOVOICES project and from the need to establish a common terminology shared among scientists, enterprises, policymakers and civil society organisations on the bioeconomy. Indeed, the ontology provides a structured information of the BIOVOICES multi-stakeholders social platform’s content, facilitating accessing and sharing it. The building process and the validation of the ontology have been described.