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Who is NexDefense?
NexDefense is an industrial control system (ICS) and Operational technology (OT) cybersecurity provider focused on monitoring, visibility, and threat detection for critical infrastructure networks.
- ICS/OT network monitoring and visibility for utilities, manufacturing, and other critical infrastructure environments.
- Threat detection and anomaly identification across industrial control protocols and assets.
- Passive network data collection and analysis tailored to industrial and Supervisory Control and Data Acquisition (SCADA) environments.
- Support for asset inventory, risk assessment, and Security Operations (SecOps) workflows in OT networks.
- Advisory and deployment support for integrating ICS security monitoring with broader enterprise security programs.
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More About NexDefense
NexDefense focuses on cybersecurity for industrial control systems (ICS) and OT, targeting environments such as electric and water utilities, oil and gas, and discrete and process manufacturing plants. Its offerings are used by organizations that operate industrial networks where availability, safety, and deterministic control are primary design constraints, and where traditional IT security tools are not aligned with industrial protocol behavior or asset lifecycles.
The company’s core capabilities center on ICS/OT network monitoring (OT security monitoring) and threat detection (threat detection and response). Its technology passively observes traffic from programmable logic controllers (PLCs), remote terminal units (RTUs), human–machine interfaces (HMIs), and engineering workstations, as well as field devices that communicate via industrial protocols. By avoiding active scanning that could interfere with fragile or legacy equipment, NexDefense tooling is positioned for deployment on production control networks that require continuous uptime.
NexDefense analyzes industrial protocol communications to establish baselines of normal behavior and to identify deviations that may indicate misconfiguration, equipment failure, or malicious activity. This includes traffic associated with SCADA systems and widely used ICS protocols such as Modbus, DNP3, and others commonly present in energy and utility networks. The monitoring layer supports asset discovery and inventory (asset management), providing visibility into controllers, firmware versions, communication paths, and logical groupings of devices, which is a frequent prerequisite for OT security programs and compliance initiatives.
From a SecOps perspective, NexDefense is positioned as an OT-focused complement to enterprise Security Information and Event Management (SIEM) and SecOps center (SOC) workflows. Alerts and contextual data from the platform can be integrated with existing incident management and ticketing systems so that security teams can correlate OT security events with IT security telemetry. This alignment supports use cases such as incident triage, forensic analysis of ICS-related events, and ongoing risk assessments within critical infrastructure environments.
In marketplace and taxonomy terms, NexDefense fits into the industrial cybersecurity and OT security monitoring categories, with coverage of ICS threat detection, asset visibility, and SCADA security. Organizations typically evaluate it alongside other OT network monitoring platforms when seeking to implement continuous monitoring of control networks, to meet regulatory or internal policy requirements, or to extend enterprise security programs across both IT and OT domains without disrupting industrial processes.
Our description of NexDefense. Updated December 2025.
