Use it when
Use this list when one part of your environment needs managed monitoring or response coverage.
Coverage area
OT/ICS Security Monitoring
Providers covering OT/ICS. Confirm whether coverage means monitoring, investigation, or response.
8 providers
Armis Managed Threat Service
Threat hunting, suspicious-activity review, alert enrichment, risk-based policy tuning, weekly findings, trend reviews and investigation support around Armis Centrix.
Mid-Market / Enterprise · Endpoints
Service MSSP
Handles Investigate and advise
Price G-Cloud examples from £134,400 per asset block*
Bridewell Security Operations Center
Hybrid or fully outsourced SOC operation with 24/7 monitoring, alert investigation, threat hunting, threat intelligence, SIEM and SOAR enhancement, incident response leadership and detection improvement across agreed environments.
Mid-Market / Enterprise · Endpoints
Service SOCaaS
Handles Run the SOC
Price Public G-Cloud references by user, server and scope
Critical Start
24x7 MDR monitoring, investigation, false-positive reduction, alert resolution workflow, scoped response actions, coverage-gap visibility and SOC collaboration through CORR and MOBILESOC.
Mid-Market / Enterprise · Endpoints
Service MDR
Handles Contain threats
Price Quote-based tiered MDR with AWS Marketplace private-offer procurement
Darktrace Managed Detection and Response
24/7 SOC monitoring of the buyer's Darktrace environment, alert triage, investigations, containment-action escalation, analyst questions, monthly service reports, service-ready checks and optimization reviews.
Mid-Market / Enterprise · Network
Service MDR
Handles Co-manage the SOC
Price Quote-based; AWS Marketplace supports private offers but does not expose a reliable public service rate.
Forescout Assist for Threat Detection & Response
24/7 monitoring of Forescout TDR detections, suspicious-entity triage, incident case investigation, impact classification, customer escalation, proactive threat hunting, log-source monitoring and containment or remediation guidance.
Enterprise / Mid-Market · Endpoints
Service MDR
Handles Investigate and advise
Price Public reseller signal: CDW lists a one-year Forescout Assist F/XDR subscription SKU at $11,771.99; final Assist scope is quote-based.
Mandiant Managed Defense
24/7 Mandiant MDR with alert triage, investigation, threat hunting, curated detections, investigation reports, supported technology integrations and scoped response actions through Google SecOps and partner tools.
Mid-Market / Enterprise · Endpoints
Service MDR
Handles Contain threats
Price CDW reseller listing shows $53.99 for one Managed Defense subscription license SKU
Orange Cyberdefense Managed Threat Detection and Response
24/7 managed detection, triage, investigation and contracted response through Orange Cyberdefense CyberSOCs, Core Fusion and supported EDR, NDR, SIEM, cloud and OT telemetry
Mid-Market / Enterprise · Endpoints
Service MDR
Handles Contain threats
Price Quote-based, private-offer signals
ReliaQuest GreyMatter
GreyMatter connects to enterprise security tools, normalizes alerts, supports investigation and hunting, runs approved response playbooks and gives the buyer a shared operating surface with ReliaQuest analysts and engineers.
Enterprise / Mid-Market · Endpoints
Service Co-managed SOC
Handles Co-manage the SOC
Price AWS Marketplace lists a 12-month GreyMatter SIEM Integration Plus package at $226,000*
How to use this list
Do not assume
Coverage does not always mean action. Some providers monitor a source but cannot contain threats there.
Ask before shortlisting
- Confirm which telemetry sources are included by default.
- Ask whether response actions work on this surface or only alerting is included.
- Check whether reporting and detection tuning are part of the managed service.
Category background
These SOC providers monitor operational technology (OT) and industrial control systems (ICS) for cybersecurity threats — including SCADA, PLCs, and industrial network traffic. As IT and OT networks converge, protecting critical infrastructure from cyber threats is an urgent priority for manufacturing, energy, utilities, and government organizations.
Why OT/ICS Monitoring Matters
Industrial control systems were designed for reliability, not security. Many run legacy protocols and operating systems that cannot be easily patched or updated. The convergence of IT and OT networks has exposed these systems to threats they were never designed to withstand — including ransomware, nation-state attacks, and supply chain compromises. High-profile incidents like the Colonial Pipeline attack have demonstrated the real-world consequences of OT security failures.
What to Look For
Evaluate providers on their ability to discover and inventory OT assets, parse industrial protocols, detect anomalies without disrupting operations, and coordinate response actions with plant engineers and operational staff. Specialized OT SOC providers maintain separate monitoring environments for OT networks and employ analysts with industrial security certifications (GICSP, GRID) and experience in ICS-specific threat landscapes.
Questions
What does OT/ICS security monitoring cover?
OT/ICS security monitoring covers supervisory control and data acquisition (SCADA) systems, programmable logic controllers (PLCs), distributed control systems (DCS), human-machine interfaces (HMIs), and the industrial networks connecting them. SOC providers monitor for unauthorized access, protocol anomalies, firmware changes, and lateral movement between IT and OT networks.
Why is OT security different from IT security?
OT environments run specialized industrial protocols (Modbus, DNP3, OPC-UA, BACnet) that traditional IT security tools cannot parse. Equipment often runs legacy operating systems that cannot be patched, availability takes priority over confidentiality, and a misconfigured response action could disrupt physical processes or endanger safety. OT-capable SOC providers understand these constraints and tailor their monitoring and response accordingly.
Can a single SOC provider cover both IT and OT?
Some providers offer converged IT/OT monitoring, which is increasingly valuable as IT-OT network boundaries blur. However, OT monitoring requires specialized protocol analysis, asset discovery capabilities, and response playbooks that respect operational constraints. Look for providers with dedicated OT expertise, not just IT monitoring extended to industrial networks.