The Gates Foundation engaged ORS Impact (ORS) to develop a culturally relevant, methodologically rigorous tool to learn more about successful capacity building. The ORS team’s approach brought constituent needs and voice to the forefront throughout the process of tool development as well as its implementation. This brief shares the Gates Foundation’s tool, which can help advocates and foundations understand what constitutes strong advocacy and communications as well as opportunities to build capacity. The tool can also help organizations and foundations understand how advocacy and communications capacity is changing over time.