Endian 4i vs ICSREF: Side-by-Side Comparison (2026)

Mid-market and enterprise OT teams defending distributed industrial networks will value Endian 4i's ruggedized appliance form factor and native support for legacy protocols without requiring network redesign. The -20°C to +60°C operating range and DIN rail mounting are built for factory floors, not data centers, and the hybrid deployment option lets you start physical and shift virtual as your environment matures. Skip this if your sites run primarily IT-standard infrastructure or if you need NIST Respond capabilities; Endian 4i prioritizes continuous monitoring and resilience architecture over incident recovery workflows.