This evidence review highlights commonalities across four selected market-based approaches to inform learning within the GCF and the broader climate finance landscape. It aggregates findings from studies included within existing systematic reviews, synthesizing them using qualitative methods. The review examines the effectiveness of these approaches in achieving desired outcomes in developing countries and identifies factors influencing their efficiency. By addressing these aspects, the findings aim to enhance the origination and programming of return-generating projects in the GCF and climate finance fields.