The emergence of extended detection and response (XDR) has plunged security pros into yet another confusing and dissatisfying debate over whether a technology will be a true alternative to SIEM or will be just another copycat. Differentiated XDR technology will supersede endpoint detection and response (EDR) in the short term and usurp SIEM in the long term. XDR provides a novel approach to a decades-old problem, as EDR providers expand their capabilities and their target market. Security and risk (S&R) pros should use this report to understand the capabilities of emerging XDR vendors within major segments of the market and to inform their technology strategies.