This edited book explores the evolving relationship between fintech, regulation, and sustainable development from a global perspective. It provides comparative analyses of regulatory approaches in the EU, Germany, Türkiye, and selected emerging markets, assessing how fintech innovations, such as digital payments, equity crowdfunding, and green finance—support financial inclusion and sustainability goals. Combining policy analysis with empirical insights, the volume serves as a practical guide for researchers, policymakers, and practitioners seeking to navigate the complex intersection of technological innovation and responsible regulation.