This deliverable provides an overview of the collaboration and synergy activities undertaken within the NOUS project under Task T8.4, focusing on how joint efforts with European initiatives, sister projects, and international stakeholders enhance interoperability, data sovereignty, and open-source innovation. It documents the project’s communication and dissemination channels, its participation in major events and workshops, and the establishment of the NOUS Synergy Platform to foster strategic cooperation with initiatives such as Gaia-X, FIWARE, EOSC, and DSSC. By highlighting publications, technical contributions, and stakeholder engagement, the report demonstrates how NOUS maximizes visibility, strengthens alignment with European digital strategies, and lays the foundation for sustainable impact through a federated and future-proof European cloud ecosystem. Funded by the European Union. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or European Commission. Neither the European Union nor the granting authority can be held responsible for them. Project no. 101135927