The current crisis is proving to be productive of institutional experimentation in the realm of financial architecture(s) in the developing world. The drive toward experimentation arose out of the East Asian financial crisis of 1997‐98, which provoked some developing countries to take steps to insulate themselves from future turbulence, IMF sanctions, and intrusions into policy space. I argue that there are diverse, unambiguous indications that the global financial architecture is now evolving in ways that contribute to a new institutional heterogeneity. In some policy and institutional innovations we see the emergence of financial architecture that is far less US- and IMF‐centric than has been the norm over the past several decades. Moreover, the growing economic might, self‐ confidence and assertiveness on the part of policymakers in some developing countries (and, at the same time, the attendant uncertainties surrounding the economies of the USA and Europe) is disrupting the traditional modes of financial governance and dispersing power across the global financial system. In making these arguments it is important not to overstate the case. It is far too early to be certain that lasting, radical changes in the global financial architecture are afoot, or that the developments now underway are secure. Nor am I arguing that all regions of the developing world either enjoy the opportunity and/or have the means to participate in the process of reshaping the global financial architecture. Rather, my goal is more modest. I show here that today there are numerous opportunities for policy and institutional experimentation, and there are clear signs that these opportunities are being exploited in a variety of distinct ways. As compared to any other moment over the last several decades, we see clear signs of fissures, realignments and institutional changes in the structures of financial governance across the global South. I have elsewhere characterized this current state of affairs as one of “productive incoherence.” I use this term to capture the proliferation of institutional innovations and policy responses that have been given impetus by the crisis, and the ways in which the current crisis has started to erode the stifling neo‐liberal consensus that has secured and deepened neo‐liberalism across the developing world over the past several decades. The productive incoherence of the current crisis is apparent in the emergence of a denser, multi-layered and more heterogeneous Southern financial architecture. The current crisis has induced a broadening of the mission and reach of some existing regional, sub‐regional, bilateral, and national financial institutions and arrangements, and has stimulated discussions of entirely new arrangements. In some limited cases these institutions and arrangements substitute for the Bretton Woods institutions. This substitution is most pronounced in cases when the Bretton Woods institutions have failed or have been slow to respond to calls for support, or when they have responded to such requests with conditionality that has been overly constraining of national policy space. But in most cases, the institutions and arrangements that I discuss here complement the global financial architecture. I will argue in what follows that recent changes in the Southern financial landscape increase its potential to promote financial stability and resilience, support the development of long-run productive capacities, advance aims consistent with human development, and expand national policy space. Moreover, the emergence of a vibrant Southern financial architecture is not simply additive. Rather it may prove transformative, insofar as the Bretton Woods institutions are pushed to respond to long‐standing concerns regarding their legitimacy, governance, and conditionalities.