On 13 September 2016, the expert workshop "Discussion of an assessment system for civil society initiatives to measure sustainability and transformative potential" took place in Berlin. At the workshop, about 30 participants from science, policy, foundations, and sustainability initiatives discussed the first draft of a criteria catalogue for measuring and presenting the societal benefit of niche sustainability initiatives, especially their sustainability and transformative potential. Stephanie Wunder, Senior Fellow at Ecologic Institute, presented the assessment system. In the workshop, the application of the criteria catalogue to two case studies was also presented. The criteria for estimating the sustainability potential, the transformative potential, the organizational capacity for action, and the scalability of the initiatives were developed from 13 political and scientific assessment systems and from transition literature.