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Nature of the Business	12 Months Ended
Nature of the Business	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of the Business	Nature of the Business Rapid7, Inc. and subsidiaries (“we,” “us” or “our”) is trusted by IT and security professionals around the world to manage risk, simplify modern IT complexity, and drive innovation. Our analytics help transform today's vast amount of security and IT data into the answers needed to securely develop and operate sophisticated IT networks and applications.