Endian 4i vs FreeWave Zentry: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros and cons, compared head to head.
Endian 4i is a commercial industrial control system security tool by Endian. FreeWave Zentry is a commercial industrial control system security tool by FreeWave Technologies. Compare features, ratings, integrations, and community reviews side by side to find the best industrial control system security fit for your security stack. Independent and vendor-neutral: our scores and rankings are earned, never bought — sponsored placement is always labeled.
CST VerdictBased on our analysis of core features, integrations, company size fit, deployment model, here is our conclusion:
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.
Data verified Oct 2026
