This blog post is the report of the workshop on Sustainable non-APC OA publishing models (MS18 Workshop on collaborative publishing models). The 9th international OpenAIRE workshop on Sustainable non-APC open access (OA) publishing models took place on February 26-27, 2019 at the University of Bielefeld, Germany. It showcased a range of successful non-APC OA publishing models. A particular focus was on consortia models, assessing their relative strengths and weaknesses, conducting cross-dis...