Abstract: | While international nongovernmental organisations (INGOs) have been heavily studied for their role in transnational advocacy, most research has ignored their internal organisation and the relationships between international and grassroots offices. Intuition suggests that INGOs should face structural imperatives to balance maintaining global brands while simultaneously mobilising disparate publics in local contexts. However, this intuition has not yet been systematically studied. We address this with a paired comparison of Amnesty International and Greenpeace. Using case studies and an original dataset of website attributes, we show that campaigns promoted by international offices and their national counterparts reflect a balance between local diversity and global unity, revealing organisational structures that combine centralised agenda-setting with decentralised agenda implementation. Our research identifies a “measurement gap” with implications for understanding INGO accountability and effectiveness, and indicates that a more complete research programme on INGOs must include attention to internal organisation and structural diversity. |