Today, mobile money services are available throughout much of the developing world. Most markets have a live offering and many have multiple services. In 2007, there were fewer than 20 mobile money services for the unbanked worldwide. Since then the number of deployments has ballooned to over 190, with another 115 planning to launch. How are these 190 services faring? Unevenly. Many mobile money services have yet to achieve significant scale, but a collection of stand-out services appear to have figured out the formula and are riding a steep growth trajectory. This report is a compendium of case studies from the Mobile Money for the Unbanked Programme, discussing in detail many of the success stories and innovations from the mobile money industry.