This article explores trust dynamics among a coalition of civil society organizations called Unite Behind that formed in Cape Town, South Africa, in late 2017. Unite Behind was established to demand more accountability from a state marred by corruption—and specifically for the resignation of then President Jacob Zuma. When Zuma resigned, the coalition attempted to transition to a social movement campaigning for social justice but declined as a coalition into an organization of sorts. Taking trust as a positive belief in the reliability, truth or ability of an actor or entity, this article argues that conceptions of political and social/generalized trust are of less importance in explaining the rise and fall of Unite Behind than a combination of personal trust in particular leaders, and a form of particularized trust, namely, trust in other organizations. This notion of organizational trust as a form of particularized trust is of potential wider importance to the analysis of civil society network co-ordination.