Based on a study of the Swiss mobile payment app Twint and its use as a tool for charitable giving, this article introduces a framework for studying redistributive imaginaries and examines donation ‘marketplaces’ and their implications. Engaging with literatures on socio-technical imaginaries, the platformization of payment, post-humanitarianism, and the digital-solutionist ethic, the article asks what happens when practices of giving are facilitated and enclosed by a tech-ified finance industry. Twint’s catalog-like platform for donating reconfigures digital giving and its relation to redistribution. We argue that donations platforms like Twint’s are introducing a new redistributive imaginary by interpellating users as donors, consumers and citizens who – given behavioral psychology – need guidance to exercise choice and become more ethical selves. On the basis of an interface analysis and interviews, we specify a ‘post-sovereign consumer-citizen redistributive imaginary’, characterized by a market frame and tech-solutionism. This imaginary relies on a bounded-rationality model of the human and promotes a post-political idea of democratic participation. The article notes a slippage between different semantics of ‘good’ and ‘better’ technology, which are relevant for a discursive-ideological analysis of the FinTech sector and its rhetoric more broadly. Analyzing them helps us better understand how platform operators are accruing power culturally, economically, and politically.