Crowdfunding research to date has mainly focused on the nature and dynamics characterizing platforms containing creative and innovative ideas, while less attention has been given to subsistence entrepreneurship which centers on social, environmental, and economic concerns. This chapter develops a conceptual framework to examine the sustainable crowdfunding process supporting subsistence entrepreneurship, and then using the framework, the case illustration of Kiva is presented to describe how sustainable crowdfunding facilitates the development of ventures created to alleviate poverty and promote sustainability. The proposed framework combines elements of crowdfunding with aspects of sustainability, as well as subsistence entrepreneurship. Subsistence entrepreneurship includes the actions, activities, and processes undertaken by individuals living in the bottom of the pyramid to promoting sustainability. Crowdfunding acts as a key tool to attract financial means relevant for subsistence entrepreneurship. The chapter concludes with a discussion of key implications that arise from this research.