A recent OECD report estimated that total private philanthropy for development amounted to USD 8 billion per year. While these resources are still modest compared to official development finance, foundations are becoming key partners in specific sectors, in particularly the health sector. Based on the resources spent by 143 foundations over the years 2013-2015, foundations' support was the third-largest source of financing in the health and reproductive health sectors (OECD, 2018psj).