Best OT and ICS Security Monitoring Software in 2026
Updated
In short: Honeywell Forge is ranked #1 of 16 as of 4 October 2026, ahead of Nozomi Networks Platform and Tenable One Attack Surface Management. The best-ranked option with a free plan is Nozomi Networks Platform.
If you’re assessing security monitoring for an industrial environment, compare how each option handles OT asset discovery and passive monitoring, as well as supported protocols and SIEM integration. Asset limits and deployment can help you judge practical fit; free-plan availability and paid-from pricing add cost context. The ranking starts with Nozomi Networks Platform and Kaspersky Industrial CyberSecurity Platform, followed by Tenable One Attack Surface Management, Claroty xDome, and Dragos Platform. Use these comparison points to consider the visibility you need, the systems you must connect, and how the deployment and cost details fit your requirements.
16 OT and ICS security monitoring software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
#1 Honeywell Forge Top pick · 7.0 
#2 Nozomi Networks Platform Runner-up · 7.0 Free plan · Free
#3 Tenable One Attack Surface Management Also great · 6.6 
- AndroidapiiOSLinuxmacOSWebWindows
- Deployment
- on_premises
- Passive monitoring
- Yes
- OT asset discovery
- Yes
RecognisedDocumentedFree planPlatforms - Free plan apiLinuxself-hostedWeb
- Passive monitoring
- Yes
- OT asset discovery
- Yes
- Supported protocols
- Modbus, IEC 61850-8-1 (MMS), EtherNet/IP, PROFINET, BACnet
RecognisedDocumentedFree planPlatforms - LinuxmacOSWebWindows
- Passive monitoring
- Yes
- OT asset discovery
- Yes
- Supported protocols
- Modbus, Modbus UMAS, Modbus MODICON, CIP, PROFINET, DNP3, IEC 60870-5-104, MMS, S7/S7+, IEC 61850
RecognisedDocumentedFree planPlatforms - LinuxWebWindows
- Deployment
- on_premises
- Passive monitoring
- Yes
- OT asset discovery
- Yes
- Supported protocols
- ABB SPA-Bus; Allen-Bradley EtherNet/IP; BACnet; BECKHOFF ADS/AMS; CODESYS V2/V3 Gateway; DNP3; Emerson DeltaV; General Electric SRTP/EGD; IEC 60870-5-101/104; IEC 61850 GOOSE/MMS/Sampled Values; Mitsubishi MELSEC System Q; Modbus TCP; OMRON FINS; OPC DA; OPC UA Binary; PROFINET IO; Schneider Electric UMAS; Siemens Industrial Ethernet; Siemens S7comm/S7comm-plus; TASE.2; Yokogawa Vnet/IP; Honeywell Experion PKS/PlantCruise; Honeywell ControlEDGE 900
RecognisedDocumentedFree planPlatforms - self-hostedWeb
- Deployment
- hybrid
- Passive monitoring
- Yes
- OT asset discovery
- Yes
- Supported protocols
- Modbus, CIP, DNP3, IEC 104
RecognisedDocumentedFree planPlatforms - self-hosted
- Deployment
- on_premises
- Passive monitoring
- Yes
- OT asset discovery
- Yes
- Supported protocols
- Modbus, DNP3, CIP, OPC UA, 450+ industrial protocols
RecognisedDocumentedFree planPlatforms - apiWeb
- Deployment
- cloud
- Passive monitoring
- Yes
- OT asset discovery
- Yes
- Supported protocols
- Modbus
RecognisedDocumentedFree planPlatforms - self-hostedWeb
- Passive monitoring
- Yes
- OT asset discovery
- Yes
- Supported protocols
- 600+ industrial and IT protocols
RecognisedDocumentedFree planPlatforms - WebWindowsmacOSLinux
- Free plan
- No
- Deployment
- hybrid
- Supported protocols
- SNMP v2c, CDP, LLDP, SSH, syslog
RecognisedDocumentedFree planPlatforms - Windows
- Deployment
- on_premises
- Passive monitoring
- Yes
- OT asset discovery
- Yes
- Supported protocols
- Modbus (TCP and RTU), S7comm, DNP3, EtherNet/IP, IEC-104, IEC 61850, PROFINET, EtherCAT, POWERLINK, CC-Link IE, OPC UA, BACnet, FINS, MELSEC, HART-IP
RecognisedDocumentedFree planPlatforms - Web
- Passive monitoring
- Yes
- OT asset discovery
- Yes
- Supported protocols
- S7Comm, CIP, SNMP, BACnet, Modbus, WMI, HTTP, DNP3, IEC 60870-5-104, Profinet
RecognisedDocumentedFree planPlatforms -
- Deployment
- on_premises
- Passive monitoring
- Yes
- OT asset discovery
- Yes
- Supported protocols
- OPC, IEC 60870-5-104, IEC 61850-8-1, DNP3
RecognisedDocumentedFree planPlatforms - Web
- Passive monitoring
- Yes
- OT asset discovery
- Yes
- Supported protocols
- Modbus, EtherNet/IP, CIP, FINS, S7Comm/S7Comm+, SECS/GEM, IEC 61850-MMS, IEC-104, and 180+ additional industrial protocols
RecognisedDocumentedFree planPlatforms -
- Deployment
- on_premises
- Passive monitoring
- Yes
- OT asset discovery
- Yes
- Supported protocols
- EtherNet/IP, EtherCAT, S7Comm, Modbus
RecognisedDocumentedFree planPlatforms -
- OT asset discovery
- Yes
RecognisedDocumentedFree planPlatforms -
- Free plan
- No
- Deployment
- on_premises
- Passive monitoring
- Yes
- OT asset discovery
- Yes
- Supported protocols
- IEC 61850 (MMS/GOOSE/SV), Siemens S7, CIP/ENIP, BACnet, Modbus, DNP3, MQTT
RecognisedDocumentedFree planPlatforms
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which OT and ICS security monitoring software is ranked first on Everything Xiaomi?
Honeywell Forge is ranked #1 of 16 with a score of 7.0. Nozomi Networks Platform is second and Tenable One Attack Surface Management third.
How many of these have a free plan?
1 of the 16 on this page publish a free plan on their own pricing pages.
How is this list ranked?
Ranked on what each maker publishes: documentation depth, a free tier and the platforms it runs on. Paid placements never change a rank.