Abstract
This article provides a summary of the library‑based diamond open access (OA) publishing services offered by Edinburgh Diamond at the University of Edinburgh and the Open Journals Service at Liverpool John Moores University (LJMU). The article, based on a presentation given at UKSG 2024, looks at similarities and differences observed by the managers of the two services and, although Edinburgh Diamond also publishes books, will focus predominantly on journal hosting. It also looks at the advantages of running a hosting service, before reviewing some key factors to consider: skills and personnel, financial and business models and overall sustainability. This article concludes by looking to the future and what the two services hope to achieve.