How do the goals and activities of civil society organisations (CSOs) that are active in the field of immigrant welfare rights differ between autocracies and democracies? In this paper, we argue that a mechanism of CSO engagement plays out differently in these two political contexts because organisations adapt their goals and activities to the political regime they operate in. In the empirical analyses, we compare democratic Argentina and electoral‐authoritarian Malaysia using data from CSOs' public mission statements as well as from interviews with CSO members from both countries. We find that in Argentina, more universalistic constitutional provisions and commitments to international treaties allowed CSOs to reference norms of equal treatment, arguing for immigrant access to a variety of programmes, including non‐contributory social assistance benefits. In Malaysia, CSOs relied on moral frames of equality to a lesser extent. Instead, they advocated for inclusion in contributory schemes on the basis of deservingness of migrants given their contributions to society, focusing on minimum standards to guarantee that basic needs are met.