This paper unfolds a conceptual framework of migrants' transnational engagements. It combines three elements: a concept of social agent apprehended in its plurality of roles and social embedding; the Habermas theory of communicative action accounting for the communicative dimension of transnational engagements; a concept of social institution explaining the role of migrant organizations in framing transnational activities. This framework is applied to the analysis of cross border engagements of Moroccan, Algerian and Indian hometown organizations in the development of their respective sending areas.