This chapter focuses on the International Education Funders Group (IEFG), an affinity network of over 100 foundations whose grant-making efforts go towards enhancing the quality of basic education in low- and middle-income countries. These sorts of networks are rarely put under the spotlight and are often a bit of a mystery to outsiders. In order to shed some light on the role of funder affinity networks in strengthening the collective work of education grant-making, this chapter documents the history and current activities of the IEFG and throws a special focus on the organisational structure of this member-led group and how it meets the demands of its diverse membership. In a final step, the chapter describes the challenges that lie ahead for the IEFG, such as the administrative and organisational necessities of a rapidly growing network that will eventually improve the effectiveness and efficiency of education grant-making.