OT security platforms vs IT security tools for critical infrastructure: capabilities, cost, and integration compared

Why It Matters

Cyberattacks on operational technology (OT) environments surged 87 percent between 2021 and 2024, with 73 percent of industrial organizations reporting at least one intrusion that affected OT or industrial control systems in a single year (Fortinet, 2025). Colonial Pipeline, the Oldsmar water treatment facility, and a 2024 breach at a European energy utility all demonstrated that traditional IT security stacks fail to detect threats engineered for programmable logic controllers (PLCs), distributed control systems (DCSs), and supervisory control and data acquisition (SCADA) networks. The consequences extend well beyond data loss: compromised OT can halt power generation, contaminate water supplies, or disable transportation networks. As critical infrastructure operators face tightening regulations such as the EU NIS2 Directive and the U.S. Cyber Incident Reporting for Critical Infrastructure Act (CIRCIA), the question is no longer whether to invest in security but whether to extend existing IT tools into OT environments or deploy purpose-built OT security platforms. Getting the answer wrong can leave blind spots that attackers exploit within minutes.

Key Concepts

IT security tools originate in enterprise computing. Firewalls, endpoint detection and response (EDR), security information and event management (SIEM) platforms, and vulnerability scanners assume devices run standard operating systems, communicate over TCP/IP, and can tolerate periodic restarts. Leading examples include CrowdStrike Falcon, Palo Alto Networks Cortex XDR, and Splunk Enterprise Security.

OT security platforms are designed for industrial control environments that use proprietary protocols such as Modbus, DNP3, PROFINET, and OPC UA. These platforms perform passive network monitoring, deep packet inspection of ICS traffic, and asset discovery without disrupting real-time processes. Vendors include Dragos, Claroty, Nozomi Networks, and Armis.

IT/OT convergence refers to the growing interconnection between corporate IT networks and plant-floor OT networks. The Purdue Model traditionally air-gapped these domains, but cloud analytics, remote access, and IoT sensors have eroded the boundary. According to Gartner (2025), more than 60 percent of industrial enterprises will have partially converged IT and OT security operations by 2027.

ICS threat landscape differs fundamentally from IT threats. Nation-state actors such as Volt Typhoon have pre-positioned in U.S. critical infrastructure networks for months before detection (CISA, 2024). OT-specific malware families like PIPEDREAM/INCONTROLLER target safety-instrumented systems, which, if compromised, can create physical safety hazards rather than mere data breaches.

Head-to-Head Comparison

Cost Analysis

OT security platforms typically follow a subscription-plus-hardware model. Nozomi Networks charges approximately $15,000 to $30,000 per sensor appliance, plus annual software subscriptions of $40,000 to $120,000 depending on the number of monitored assets (Nozomi Networks, 2025). Dragos Platform pricing begins at roughly $100,000 per year for a single site and scales to $500,000 or more for multi-site deployments with managed threat hunting. Claroty xDome falls in a similar range, with per-asset pricing that averages $50 to $150 per monitored device annually for large environments.

IT security tools have lower per-device licensing because of higher market maturity and competition. CrowdStrike Falcon Pro costs approximately $100 per endpoint per year, and Splunk Enterprise Security runs $150 to $250 per GB of daily ingestion (CrowdStrike, 2025). However, extending IT tools into OT requires significant professional services to build custom parsers for ICS protocols, write detection rules for process anomalies, and manage exceptions for devices that cannot run agents. Dragos estimates that organizations spending $500,000 on IT tool customization for OT still achieve only 40 percent protocol visibility compared with purpose-built OT platforms (Dragos, 2025).

Total cost of ownership (TCO) over five years for a mid-sized utility with 2,000 OT assets:

The apparent savings of the IT-tool approach evaporate when factoring in the cost of a single OT-related incident. Ponemon Institute (2025) estimated the average cost of an OT breach at $4.7 million, compared with $4.0 million for a pure IT breach. The gap widens when physical safety, environmental damage, and regulatory penalties are included.

Use Cases and Best Fit

OT platforms are the clear choice for environments where safety-critical processes dominate. Electric utilities regulated under NERC CIP, oil and gas pipelines subject to TSA Security Directives, and water treatment plants governed by the EPA's Sector-Specific Plan benefit from deep ICS protocol parsing and passive monitoring. Duke Energy deployed Dragos across 50 generation and transmission sites in 2024, achieving full Purdue Level 2 and 3 visibility within six months (Dragos, 2025). Similarly, Saudi Aramco standardized on Claroty after a 2023 pilot demonstrated 98 percent asset discovery accuracy across legacy Honeywell and Yokogawa control systems.

IT tools extended to OT work well in converged environments where IT assets outnumber OT devices, such as smart buildings, logistics hubs, or light manufacturing. Siemens Smart Infrastructure uses Palo Alto Networks to protect building management systems (BMS) that communicate over BACnet/IP, augmenting coverage with a lightweight OT overlay (Siemens, 2024). This hybrid approach suits organizations with mature IT security operations centers (SOCs) and limited legacy ICS equipment.

Hybrid architectures increasingly dominate large enterprises. Enel, the multinational energy company, integrates Nozomi Networks sensors at plant level with a centralized Splunk SIEM, feeding OT alerts into the same analyst workflow as IT incidents (Nozomi Networks, 2025). The model requires well-defined data pipelines, shared taxonomy, and cross-trained analysts but delivers a single pane of glass across both domains.

Decision Framework

1. Inventory your assets. If more than 30 percent of monitored devices use ICS-specific protocols (Modbus, DNP3, OPC UA), an OT-native platform is essential. If most devices are IP-based and IT-standard, extended IT tools with an OT overlay may suffice.

2. Assess safety criticality. Environments where a cyber event could cause physical harm, environmental release, or loss of life require passive-only monitoring. Active scanning by IT tools is contraindicated for PLCs and safety-instrumented systems.

3. Evaluate regulatory requirements. NIS2, NERC CIP, IEC 62443, and TSA directives mandate OT-specific controls that IT-centric tools rarely address out of the box. Map your compliance obligations before selecting a platform.

4. Audit existing capabilities. Organizations with a mature SOC, an established SIEM, and trained analysts may extract more value from a hybrid approach, feeding OT sensor data into the existing platform. Greenfield OT security programs benefit from an integrated OT platform that includes threat intelligence and incident response playbooks.

5. Calculate five-year TCO. Include hardware, software, integration, staffing, and incident response. Weight the cost of an OT breach (averaging $4.7 million per Ponemon, 2025) against the marginal investment in purpose-built capabilities.

6. Plan for convergence. Even if starting with separate IT and OT stacks, design data flows, alert taxonomies, and analyst training to support eventual consolidation. Gartner (2025) recommends a unified security operations model by 2028 for all critical infrastructure operators.

Key Players

Established Leaders

• Dragos — Market-leading OT cybersecurity platform with ICS-specific threat intelligence and incident response services. Deployed across 500+ industrial sites globally.
• Claroty — xDome platform provides asset discovery, vulnerability management, and threat detection across ICS, IoT, and BMS environments. Backed by SoftBank and acquired Medigate in 2022 for healthcare IoT coverage.
• Nozomi Networks — Vantage cloud platform and Guardian sensors cover 110+ ICS protocols. Used by over 100 energy and water utilities worldwide.
• Palo Alto Networks — IT security leader with OT Security subscription for its next-gen firewalls, integrating ICS protocol visibility into the Cortex ecosystem.
• Fortinet — OT security appliances (FortiGate Rugged) designed for harsh environments with integrated ICS threat detection.

Emerging Startups

• Armis — Agentless asset visibility platform covering IT, OT, IoT, and medical devices. Raised $200 million at a $4.75 billion valuation in 2024.
• OTORIO — Risk-based OT security platform with digital twin modeling for industrial environments. Founded by former Israeli defense cyber leaders.
• Phosphorus — Automated firmware patching and credential management for OT/IoT devices, addressing a gap that most monitoring platforms leave open.
• Xage Security — Zero-trust identity and access management built specifically for OT/ICS environments with decentralized enforcement.

Key Investors/Funders

• SoftBank Vision Fund — Lead investor in Claroty ($400M+ total funding) and active in industrial cybersecurity.
• Koch Disruptive Technologies — Invested in Dragos, bringing industrial operator insight to product development.
• Accel Partners — Early backer of multiple cybersecurity platforms including CrowdStrike and OT-adjacent startups.
• U.S. Department of Energy (CESER) — Funds research and pilot programs for critical infrastructure cybersecurity through the CISA and national labs.

FAQ

Can IT tools like CrowdStrike or Splunk protect SCADA systems? They can provide partial visibility, especially at the IT/OT boundary and on Windows-based HMI and historian servers. However, they lack native parsing for ICS protocols, cannot passively discover PLCs and RTUs, and may introduce latency or instability if deployed actively in OT networks. Most experts recommend pairing IT tools with an OT-native overlay rather than using them as a standalone solution.

What is the biggest risk of using only IT tools in OT environments? The primary risk is blind spots. IT tools typically achieve only 30 to 40 percent visibility into ICS traffic because they cannot parse proprietary protocols. This means an attacker who compromises a PLC or manipulates process variables may go undetected. The 2021 Oldsmar water treatment attack, where an operator noticed a suspicious change in sodium hydroxide levels on an HMI screen rather than a security alert, illustrates this gap.

How long does it take to deploy an OT security platform? For a single industrial site, deployment typically takes four to eight weeks, including sensor placement, passive data collection for baselining, and integration with existing SIEM or SOC workflows. Multi-site rollouts can take six to twelve months. Dragos reports that most customers achieve initial asset visibility within 48 hours of sensor activation, with behavioral baselines maturing over 30 to 60 days.

Is a hybrid IT/OT approach the best strategy? For large organizations with both enterprise IT and industrial OT environments, a hybrid approach delivers the strongest coverage. OT-native sensors handle protocol-specific detection and asset management at the plant level, while a centralized IT SIEM aggregates alerts across domains. The key challenge is staffing: analysts need cross-domain training to triage OT alerts effectively, and playbooks must account for the fact that isolating an OT asset may cause physical process disruptions.

How do regulations like NIS2 affect tool selection? NIS2, which took effect in October 2024, requires essential and important entities across 18 sectors to implement risk-based cybersecurity measures, conduct supply chain assessments, and report incidents within 24 hours. The directive explicitly covers OT environments and demands sector-specific controls. Organizations relying solely on generic IT tools may struggle to demonstrate compliance, particularly around ICS asset inventories, OT vulnerability management, and incident response for industrial processes.

Sources

• Fortinet. (2025). 2025 State of Operational Technology and Cybersecurity Report. Fortinet.
• Dragos. (2025). OT Cybersecurity Year in Review 2024. Dragos, Inc.
• Mandiant. (2025). M-Trends 2025: Special Report on Cyber Threat Intelligence. Google Cloud / Mandiant.
• Gartner. (2025). Predicts 2026: IT/OT Security Convergence Accelerates Across Critical Infrastructure. Gartner, Inc.
• CISA. (2024). Advisory: PRC State-Sponsored Actors Compromise and Maintain Persistent Access to U.S. Critical Infrastructure (Volt Typhoon). Cybersecurity and Infrastructure Security Agency.
• Ponemon Institute. (2025). Cost of a Data Breach Report 2025: OT and IoT Supplement. IBM / Ponemon Institute.
• Nozomi Networks. (2025). OT/IoT Security Report: Trends and Countermeasures for Critical Infrastructure. Nozomi Networks.
• CrowdStrike. (2025). 2025 Global Threat Report. CrowdStrike Holdings.