Vectra Fusion is a network detection and response (NDR) platform that provides observability and threat detection across multi-cloud and hybrid environments. The platform uses AI-driven detection capabilities called Attack Signal Intelligence to analyze network traffic, cloud infrastructure, and identity-based threats in real-time. The platform covers three primary protection areas: network security, cloud security, and identity security. It integrates signals from these domains to identify active compromises and attacker progression across hybrid environments. The system is designed to detect modern attack techniques that may evade traditional security tools like EDR, SIEM, SASE, and native cloud security solutions. Vectra Fusion includes capabilities for threat hunting, investigation workflows, and automated response actions. The platform offers 360 Response functionality that enables containment actions across identity, devices, and network traffic. It provides detection coverage for various attack scenarios including ransomware, AWS-specific attacks, and hybrid infrastructure threats. The solution can be deployed as a self-managed platform or through managed detection and response (MDR/MXDR) services. It supports integration with existing security infrastructure and SIEM platforms for optimization and extended detection capabilities. The platform is positioned to address use cases including SOC modernization, cloud control plane protection, critical infrastructure risk management, and OT environment security.