During times of crisis, economic practices organized on principles of reciprocity often arise. Greece, with the vibrant sociality pertaining to its 'solidarity economy', is a case in point. This article is premised on the idea that crises make contradictions in societies more visible. I suggest that a central contradiction is at play in Greece between informal and formalized economic activity, as demonstrated in the tension between the fluid features of 'solidarity' networks and the formalization proposed or imposed on them by state institutions. In Thessaloniki, the informal solidarity economy proves to be more efficient than the work of NGOs. Arguing that such economic activities are built around the rise of new forms of sociality rather than a tendency toward bureaucratization, the article contributes to anthropological understandings of solidarity and welfare, as well as their relation.