Best OT and ICS Security Monitoring Software in 2026
Updated
Industrial environments can involve connected assets and protocols that require security monitoring suited to operational technology and control systems. Honeywell Forge, Nozomi Networks Platform, and Tenable One Attack Surface Management are among the options shown. Compare OT asset discovery and passive monitoring with supported protocols and SIEM integration to assess the listed visibility and connection capabilities. Asset limits and deployment provide additional operational factors to weigh. Free-plan availability and paid-from pricing add cost details to the comparison. Consider what you need to monitor and how the listed deployment, protocol, and integration details relate to your environment.
17ranked
2free plans on this page
A$200/molowest paid tier
8 Oct 2026last checked
Input list OT and ICS Security Monitoring Software 17 channels on this page · 74 of 136 spec lines stated by the makers
Ch Tool Free planPaid fromDeploymentPassive monitoringOT asset discoverySupported protocolsAsset limitSIEM integration Spec sheet Score
01 Honeywell Forge Free planPaid fromDeploymenton premisesPassive monitoringYesOT asset discoveryYesSupported protocolsAsset limitSIEM integrationYes 4/8spec lines stated 7.4
02 NetPol Free planNoPaid fromDeploymenthybridPassive monitoringOT asset discoverySupported protocolsSNMP v2c, CDP, LLDP, SSH, syslogAsset limit25 assetsSIEM integration 4/8spec lines stated 7.2
03 Nozomi Networks Platform Free planPaid fromDeploymentPassive monitoringYesOT asset discoveryYesSupported protocolsModbus, IEC 61850-8-1 (MMS), EtherNet/IP, PROFINET, BACnetAsset limitSIEM integrationYes 4/8spec lines stated 7.1
04 Tenable One Attack Surface Management Free planPaid fromDeploymentPassive monitoringYesOT asset discoveryYesSupported protocolsModbus, Modbus UMAS, Modbus MODICON, CIP, PROFINET, DNP3, IEC 60870-5-104, MMS, S7/S7+, IEC 61850Asset limitSIEM integrationYes 4/8spec lines stated 7.1
05 EmberOT Free planNoPaid fromDeploymenton premisesPassive monitoringYesOT asset discoveryYesSupported protocolsIEC 61850 (MMS/GOOSE/SV), Siemens S7, CIP/ENIP, BACnet, Modbus, DNP3, MQTTAsset limitSIEM integrationYes 6/8spec lines stated 6.9
06 FactoryTalk Analytics Free planPaid fromDeploymentPassive monitoringOT asset discoveryYesSupported protocolsAsset limitSIEM integrationYes 2/8spec lines stated 6.9
07 Kaspersky Industrial CyberSecurity Platform Free planPaid fromDeploymenton premisesPassive monitoringYesOT asset discoveryYesSupported protocolsABB 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 900Asset limitSIEM integrationYes 5/8spec lines stated 6.8
08 OTDefend Free planPaid fromDeploymenton premisesPassive monitoringYesOT asset discoveryYesSupported protocolsModbus (TCP and RTU), S7comm, DNP3, EtherNet/IP, IEC-104, IEC 61850, PROFINET, EtherCAT, POWERLINK, CC-Link IE, OPC UA, BACnet, FINS, MELSEC, HART-IPAsset limitSIEM integrationYes 5/8spec lines stated 6.8
09 Radiflow iSID Free planPaid fromDeploymenthybridPassive monitoringYesOT asset discoveryYesSupported protocolsModbus, CIP, DNP3, IEC 104Asset limitSIEM integrationYes 5/8spec lines stated 6.7
10 Claroty xDome Free planPaid fromDeploymentcloudPassive monitoringYesOT asset discoveryYesSupported protocolsModbusAsset limitSIEM integrationYes 5/8spec lines stated 6.6
11 TXOne EdgeOne Free planPaid fromDeploymentPassive monitoringYesOT asset discoveryYesSupported protocolsModbus, EtherNet/IP, CIP, FINS, S7Comm/S7Comm+, SECS/GEM, IEC 61850-MMS, IEC-104, and 180+ additional industrial protocolsAsset limitSIEM integrationYes 4/8spec lines stated 6.6
12 Claroty CTD Free planPaid fromDeploymenton premisesPassive monitoringYesOT asset discoveryYesSupported protocolsModbus, DNP3, CIP, OPC UA, 450+ industrial protocolsAsset limitSIEM integrationYes 5/8spec lines stated 6.5
13 Dragos Platform Free planPaid fromDeploymentPassive monitoringYesOT asset discoveryYesSupported protocols600+ industrial and IT protocolsAsset limitSIEM integrationYes 4/8spec lines stated 6.4
14 Rhebo Industrial Protector Free planPaid fromDeploymenton premisesPassive monitoringYesOT asset discoveryYesSupported protocolsOPC, IEC 60870-5-104, IEC 61850-8-1, DNP3Asset limitSIEM integrationYes 5/8spec lines stated 6.3
15 nNetNDR Free planPaid fromDeploymenton premisesPassive monitoringYesOT asset discoveryYesSupported protocolsEtherNet/IP, EtherCAT, S7Comm, ModbusAsset limitSIEM integration 4/8spec lines stated 6.2
16 Tenable One OT Exposure Free planPaid fromDeploymentPassive monitoringYesOT asset discoveryYesSupported protocolsModbus, Modbus UMAS, Modbus MODICON, CIP, PROFINET, DNP3, IEC 60870-5-104, MMS, S7/S7+, IEC 61850Asset limitSIEM integrationYes 4/8spec lines stated 6.1
17 Armis Centrix for OT/IoT Security Free planPaid fromDeploymentPassive monitoringYesOT asset discoveryYesSupported protocolsS7Comm, CIP, SNMP, BACnet, Modbus, WMI, HTTP, DNP3, IEC 60870-5-104, ProfinetAsset limitSIEM integrationYes 4/8spec lines stated 5.9
Compare all 17 in a table
| # | Tool | Score | Free plan | Paid from | Deployment | Passive monitoring |
|---|---|---|---|---|---|---|
| 1 | Honeywell Forge | 7.4 | on_premises | Yes | ||
| 2 | NetPol | 7.2 | No | hybrid | ||
| 3 | Nozomi Networks Platform | 7.1 | Yes | |||
| 4 | Tenable One Attack Surface Management | 7.1 | Yes | |||
| 5 | EmberOT | 6.9 | No | on_premises | Yes | |
| 6 | FactoryTalk Analytics | 6.9 | ||||
| 7 | Kaspersky Industrial CyberSecurity Platform | 6.8 | on_premises | Yes | ||
| 8 | OTDefend | 6.8 | on_premises | Yes | ||
| 9 | Radiflow iSID | 6.7 | hybrid | Yes | ||
| 10 | Claroty xDome | 6.6 | cloud | Yes | ||
| 11 | TXOne EdgeOne | 6.6 | Yes | |||
| 12 | Claroty CTD | 6.5 | on_premises | Yes | ||
| 13 | Dragos Platform | 6.4 | Yes | |||
| 14 | Rhebo Industrial Protector | 6.3 | on_premises | Yes | ||
| 15 | nNetNDR | 6.2 | on_premises | Yes | ||
| 16 | Tenable One OT Exposure | 6.1 | Yes | |||
| 17 | Armis Centrix for OT/IoT Security | 5.9 | Yes |
Is your tool on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.
More in IT & Infrastructure
All IT & infrastructure listsIT Asset Management Software 111IT Automation Software 76Residential Proxy Services 73IT Knowledge Base Software 61Website Monitoring Software 55Patch Management Software 51IT SLA Management Software 50IT Help Desk Software 49Identity and Access Management Software 43IT Change Management Software 43Application Deployment Software 42IT Problem Management Software 41