Purpose: The aim of this thesis is to build a practical guide to get a clear understanding about the implementation process of Customer Relationship Management in the cloud within Small. It also describes the different concepts that are Customer Relationship Management, Cloud computing and CRM in the cloud, especially related to the SMEs, in order to have a great insight that gives the opportunity to implement successfully this paradigm. Scientific method: The research lies in the interpretative field of inquiry. Abduction is used to combine empirical data with theoretical studies in orderto tryto investigate patterns that could give an understanding of the phenomena that is studied. Descriptive research approach using multiple-case study...