Since the endorsement of the Paris Declaration on Aid Effectiveness in 2005, increasing attention has been paid by the development community on the significance of effective aid management and coordination. Amidst growing interest towards how information and communication technologies (ICTs) can be utilized to promote aid effectiveness, ICT-enabled aid management initiatives have proliferated. As we recognize scant previous work on the use of ICT in international aid governance. This study investigates the use of information systems in aid management and the challenges in their sustainability in the particular focus on Southeast Asian countries. In addressing these questions, we employ international relations (IR) constructivist lens and examine cases from Cambodia, Thailand, Indonesia, Viet Nam, Laos, Myanmar, and the Philippines. We find that, while localization of aid effectiveness norm has taken place across the countries, there were contrasting results in terms of sustainability of national information systems in aid management. We address socio-technical factors and attempt to analyze norm diffusion and its localization dynamics at the state level.