SimSpace Cyber Range is an interactive, simulated environment that provides hands-on training, testing, and demonstration of cyber defense and cybersecurity skills by replicating an organization's network infrastructure, applications, and security tools. The platform creates virtualized environments ranging from single workstations to high-fidelity digital twins of entire production networks, with the ability to connect real-world tools and physical infrastructure. It runs cybersecurity simulation exercises that mirror real adversary behavior across the full kill chain, using authentic payloads and tactics that respond intelligently as defenses react. The platform offers two threat emulation approaches: Full Kill Chain Emulation, which executes end-to-end attacks, and Atomic Emulation, which runs individual attack steps, both using authentic payloads, procedures, and lateral movements. It includes common cybersecurity tools such as firewalls, intrusion detection systems, and SIEM systems, with customization options to match real-world tools. The platform features a graphical user interface with drag-and-drop functionality for designing and deploying cyber range environments. It integrates with frameworks like MITRE ATT&CK methodology and NIST Cybersecurity Framework. The platform improves readiness for SOC teams and AI agents, validates security controls across full attack paths, and prepares individuals, teams, and AI models through live-fire exercises in a simulated cybersecurity training environment.