This chapter presents insights from practitioners with over three years of experience in the digital mapping of informal settlements in Kenya’s capital, Nairobi. Nairobi’s informal settlements are poorly documented and the state has limited reach in these areas. The projects reviewed here are initiatives intended to improve the provision of information and services in the informal economy, even when the state is absent. The chapter concludes that community-led geographical information systems (GIS) and open data can provide an alternative governance modality both in Nairobi’s informal settlements and in remote rural areas. A practical guide is offered for sustaining collaboration between citizens and state actors. Citizens, empowered with information communication technology (ICT) tools and methods, can fill in the information void found in “areas of limited statehood.”