OTDefend provides passive monitoring, threat detection, vulnerability management, and response for industrial environments. It inspects traffic from a mirror or TAP port across more than 16 industrial protocols, without injecting traffic, and supports asset discovery. A Windows agent, compatible with Windows XP through Windows 11, gathers host inventory and intrusion-detection events. Detection combines network IDS signatures with Sigma analytics and YARA signatures; the homepage states that the engine has 688 rules. Its threat-intelligence store accepts TAXII 2.1 and STIX 2.1 feeds and checks indicators against live traffic. Deployment options include an offline Docker bundle, a .deb sensor, and a bootable appliance ISO. Integrations include SIEM, endpoint, service-management, and network-security tools. OTDefend also lists reporting for IEC 62443, NERC CIP, and NIS2, with PDF exports. Security features include per-tenant isolation, role-based access, an active/standby core, and one-way sensors for data-diode segments. Pricing is available on request; a free personalized demo and consultation are offered.
Who it is for
OTDefend is aimed at critical infrastructure organizations in sectors such as energy, manufacturing, water, and oil and gas. It may suit teams that need passive OT/ICS monitoring, compliance reporting, and integrations with existing security tools.
What is good
- Inspects more than 16 industrial protocols passively.
- Windows agent supports XP through Windows 11.
- Accepts TAXII 2.1 and STIX 2.1 feeds.
- Offers IEC 62443, NERC CIP, and NIS2 reports.
- Deployment options include an offline Docker bundle.
What to know first
- Pricing is available only on request.
- Technical support hours are listed as Monday–Friday, 9:00 AM–6:00 PM.
- Emergency 24/7 support depends on the support plan.
Verdict
OTDefend combines passive industrial network monitoring with host inventory, threat intelligence, response, and compliance reporting. Pricing is tailored to the customer, so teams will need to request a proposal.
Get started with OTDefend
- Open the OTDefend website
- Request the free personalized demo and consultation
- Discuss a tailored solution proposal and pricing
- Select a deployment option: offline Docker bundle, .deb sensor, or bootable appliance ISO
- Connect monitoring through a mirror or TAP port
- Plan integrations with your listed SIEM, endpoint, service-management, or network-security tools
Limits to know first
OTDefend pricing is provided on request through a custom solution. Technical-support coverage is Monday–Friday, 9:00 AM–6:00 PM, with emergency 24/7 support based on the support plan.
Questions about OTDefend
How much does OTDefend cost?
Pricing is on request. The custom solution plan has a tailored proposal and price.
Is there a free trial?
OTDefend offers a free personalized demo and consultation with no obligation; standard demos last about 45–60 minutes.
Which platforms are supported?
The platform is listed for Linux, Windows, web, API, and self-hosted use.
What industrial protocols are supported?
Listed protocols include Modbus TCP and RTU, S7comm, DNP3, EtherNet/IP, IEC-104, IEC 61850, PROFINET, EtherCAT, POWERLINK, CC-Link IE, OPC UA, BACnet, FINS, MELSEC, and HART-IP.
Can OTDefend connect to SIEM systems?
Yes. SIEM integrations include Splunk and IBM QRadar, alongside the other listed security and service platforms.
What compliance reporting is available?
OTDefend lists reporting for IEC 62443, NERC CIP, and NIS2, including exportable PDF reports.
OTDefend plans and pricing
All plansCompared on OT and ICS security monitoring software
- 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
- SIEM integration
- Yes
