In Latin America, the emergence of a series of civil society initiatives aimed at citizen engagement for social accountability and democratization in local governance has been a novelty since the 2000s. One of these initiatives is the Latin American Network for Fair, Democratic and Sustainable Cities and Territories, which congregates over 70 initiatives in 10 countries. This article describes and analyzes the nature of civil society initiatives, their repertoires of actions, and their incidence in processes of transparency and accountability, citizen participation, public policies, and local governance. The research was conducted between 2012 and 2016, including a questionnaire with 23 initiatives in 8 countries, interviews, participant observation, and document analysis. The results show the emergence of cross-sectional and systemic accountability, counting on collaboration and co-production of information and control between citizens and government agencies.