Civil society organizations are discussed as actors who can reduce democratic deficits in global/regional governance institutions, not least the EU which is the focus of this paper. However, organizations with different aims and ideologies often come together in large meta-organizations to address EU-institutions. This paper studies how the identity and ideological acerbity of CSOs is affected by membership in heterogeneous meta-organizations through a case study of CONCORD Europe, active in the development cooperation field at the EU level. Theoretically, neo-institutional theory and research on meta-organizations is used. Empirically, documents and interviews with representatives of CONCORD and CONCORD’s membership are analyzed.