By combining environmental and social objectives in order to address climate change and other environmental challenges, ‘just transitions’ have the potential to accelerate low-carbon transitions in an inclusive and equitable manner. More broadly, by strengthening an egalitarian and ecological public sphere that protects workers’ rights and the rights of nature, just transitions can contribute to a new eco-social contract for both people and planet, guaranteeing full access to social rights and a viable future for all. But like other strategies, just transitions vary in their ambition and thus their eco-social visions. This article builds on the analytical framework developed by the Just Transition Research Collaborative to comparatively assess different just transition pathways in Germany, Poland, Spain, Sweden and the United States in the context of different types of welfare state and economic structure. The comparison may help stakeholders to evaluate different just transition policies according to contextual factors and transformative potential.