In this article social movement theory is used to assess the strategic repertoire of a relatively new sector of nongovernmental organizations (NGOs) advocating for migrants rights in Ireland. Pro-migrant NGOs are majority community- led and face a challenging political and societal context for mobilization including a restrictive immigration regime, political and media discourse that racializes migrants, weak public support for the expansion of migrants’ rights, and high rates of discrimination and social exclusion experienced by migrant communities. A competitive funding environment also inhibits pro-migrant NGOs capacity to work with emerging migrant-led organizations that simultaneously compete for state and foundation funds. Pro-migrant NGOs in Ireland have responded with a three levelled strategy, namely alliance building with sympathetic public officials and service and information provision to state bodies, campaigns contesting negative media and societal framing of migrants, and networking with transnational NGO coalitions working on immigration issues.