Help defenders move faster with multi-agent workflows for continuous, proactive protection. Your security shouldn’t be a replay Prevent cross-domain attacks with native protection Integrate protection across your digital estate with a living security fabric—connecting signals, coordinating response across domains, and continuously strengthening as threats evolve. Prevent cross-domain attacks with native protection Turn threat detection into threat disruption Stop high-confidence threats at the control layer—automatically containing breaches, preventing lateral movement, and reducing impact in real time, without relying on brittle playbooks or waiting for human approval. Turn threat detection into threat disruption Scale decisions and shrink reaction time Scale decisions with agents embedded in your workflows—bringing cross-domain context to every signal, continuously triaging, prioritizing, and driving response so teams move from backlog to action in real time. Scale decisions and shrink reaction time Explore Microsoft Defender Endpoint Security Identity Security Email & Collaboration Security Vulnerability Management Microsoft 365 Business Premium Microsoft Defender Suite for Business Premium Microsoft Defender for Business Microsoft Defender for Office 365 Defender for individuals The Total Economic Impact™ of deploying Microsoft Defender See how unifying your SecOps with Microsoft Defender helps reduce costs and response effort. Discover pricing for Microsoft Defender Microsoft Security is a recognized industry leader A Leader in the IDC MarketScape for XDR Microsoft has been named as a leader in the IDC Worldwide Extended Detection and Response Software 2025 Vendor Assessment. 2 Read the report A Leader in the IDC MarketScape for XDR A Leader in Gartner® Magic Quadrant™ for Endpoint Protection Platforms Microsoft has been named a Leader in the 2025 Gartner® Magic Quadrant™ for Endpoint Protection Platforms. 3 Read the report A Leader in Gartner® Magic Quadrant™ for Endpoint Protection Platforms Read what our customers are saying Discover more about Microsoft Defender

See what’s new in cyberthreat protection and AI Get started with the new experience Get more out of Defender Scaling security operations with Microsoft Defender Microsoft Defender Experts Suite Defend what matters most Frequently asked questions 01/ What is Microsoft Defender? Microsoft Defender is a comprehensive threat protection solution designed to protect individuals, businesses, and enterprises from malicious cyberthreats. Its primary purpose is to prevent, detect, and respond to attacks across devices, identities, applications, email, data, workloads, and cloud environments. Key features include: Threat Prevention and Detection: Advanced protection against malware, ransomware, phishing, and other cyberattacks. Extended Detection and Response (XDR): Unified security across endpoints, identities, email, and apps for integrated protection. Cloud Security: Helps identify misconfigurations and protect workloads in multicloud and hybrid environments. Endpoint Protection: Enterprise-grade security for devices, including automated investigation and remediation. Integration with Zero Trust Principles: Verifies every request and reduces attack surfaces. Cross-Platform Support: Available on Windows, macOS, Android, and iOS for individuals and families. What is Microsoft Defender? Threat Prevention and Detection: Advanced protection against malware, ransomware, phishing, and other cyberattacks. Extended Detection and Response (XDR): Unified security across endpoints, identities, email, and apps for integrated protection. Cloud Security: Helps identify misconfigurations and protect workloads in multicloud and hybrid environments. Endpoint Protection: Enterprise-grade security for devices, including automated investigation and remediation. Integration with Zero Trust Principles: Verifies every request and reduces attack surfaces. Cross-Platform Support: Available on Windows, macOS, Android, and iOS for individuals and families. 02/ How do Microsoft Defender products work together? Microsoft Defender products operate as a coordinated system that connects posture, protection, and detection and response. Signals from endpoints, identity, email, apps, and cloud are correlated to uncover exposure, identify risks early, and continuously reduce your attack surface. When threats occur, Defender moves beyond detection—disrupting attacks across domains, containing impact, and strengthening defenses over time through shared intelligence and automation. How do Microsoft Defender products work together? 03/ Do I need to deploy all Microsoft Defender workloads to get value? No. Many organizations start with endpoint protection to establish a strong security baseline and enable Defender’s predictive threat protection as a post-breach line of defense. As you expand into identity, email, apps, and cloud, Defender connects these layers—uncovering more attack paths and enabling coordinated attack disruption. Each additional workload adds context and coverage, strengthening your posture and increasing how effectively threats are prevented, contained, and remediated. Do I need to deploy all Microsoft Defender workloads to get value? 04/ How is Microsoft Defender different from traditional security tools? Many security solutions provide strong protection within individual domains, but operate in silos. Microsoft Defender is built to work across your entire environment—connecting signals from endpoints, identity, email, apps, and cloud. This enables earlier threat prevention, coordinated attack disruption across domains, and continuous improvement of your security posture—reducing reliance on manual response and disconnected tools. How is Microsoft Defender different from traditional security tools? 05/ How is Microsoft Defender licensed and packaged? Microsoft Defender is available as both standalone products and as part of broader Microsoft security offerings, including Microsoft 365 plans. This flexible approach allows you to start where you need and expand over time. As you adopt more Defender capabilities, integrated licensing delivers greater value—reducing the need for multiple point solutions and lowering overall cost while strengthening protection across your environment. See plans and pricing How is Microsoft Defender licensed and packaged? Protect everything [1] A Microsoft 365 Family, Personal, or Premium subscription is required. Note that Microsoft Defender is not available in certain regions. [2] IDC MarketScape: Worldwide Extended Detection and Response Software 2025 Vendor Assessment, doc. #US52997325e, September 2025. [3] Gartner, Magic Quadrant for Endpoint Protection Platforms, Evgeny Mirolyubov, Deepak Mishra, Franz Hinner. July 14, 2025. Gartner is a registered trademark and service mark and Magic Quadrant is a registered trademark of Gartner, Inc. and/or its affiliates in the U.S. and internationally and are used herein with permission. All rights reserved. This graphic was published by Gartner, Inc. as part of a larger research document and should be evaluated in the context of the entire document. The Gartner document is available upon request from. Gartner does not endorse any vendor, product or service depicted in its research publications, and does not advise technology users to select only those vendors with the highest ratings or other designation. Gartner research publications consist of the opinions of Gartner’s research organization and should not be construed as statements of fact. Gartner disclaims all warranties, expressed or implied, with respect to this research, including any warranties of merchantability or fitness for a particular purpose. Follow Microsoft Security