This book constitutes the thoroughly refereed post-workshop proceedings of the 10th International Workshop on Web Services and Formal Methods, WS-FM 2013, held in Beijing, China, in August 2013. The 8 papers presented were carefully reviewed and selected from 19 submissions. They cover aspects such as control-flow relations using Petri nets, consistency of cloud stores, model checking, model-drives design, analysis of context-aware systems.