The European Commission (EC) and the European Research Council (ERC) oblige funded projects and researchers to publish Open Access in the EU Open Science Policy and in the Horizon 2020 (2014-2020) and Horizon Europe (2021-2027) program guidelines.

An overview of Horizon Europe's framework conditions on the topic of Open Access can be found in the Grant Agreement (cf. p. 108f): Open Access is mandatory for funded research results. Books and long text publications should be published immediately after publication under the Creative Commons CC BY license in a repository listed in OpenDOAR, although commercial use or editing can be excluded for these publication formats, e.g. by issuing CC BY-NC or CC-BY-ND licenses. Open Access publication costs can be funded through project funds, provided that the publication meets scientific standards for licensing and the review process.

In addition, Open Research Europe provides funded projects and researchers with a free platform for publishing preprints and conducting open peer review processes.