This document discusses the ethics of cloud lawyering. It begins with an overview of cloud computing and the different types of cloud services. It then discusses the main ethical concerns related to using cloud services for legal work, including maintaining competence and protecting client confidentiality according to rules of professional conduct. It provides examples of relevant rules. The document then discusses how lawyers can evaluate cloud vendors to ensure they are properly protecting client data and privacy. It provides questions lawyers should ask vendors about security, access controls, encryption, data location, and responses to legal demands for data. Finally, it discusses factors lawyers should consider when choosing between free/low-cost versus paid/enterprise cloud services.