Digital financial services have progressed rapidly since the first mobile-money services in East Africa a decade ago. Their early success in Kenya and Tanzania sent telecom firms, banks, technology firms, and development institutions scrambling to launch similar services. Yet many or most of these new services found only limited success of their own. The process delivered valuable lessons to the industry, however, including insights about scale, effective engagement models, the importance of adopting new technologies and rethinking corporate cultures, and the need for new digital financial services and products.