Top 10 OT Vendor Recommendations for Utility Operators

The modern utility grid is a massive, hyper-connected, and distributed cyber-physical system. It bridges decades-old SCADA systems with edge-computed Industrial IoT (IIoT) sensors, smart meters, and cloud-integrated Virtual Power Plants (VPPs).

To secure this environment, you need OT-native tools that understand industrial protocols (like Modbus, DNP3, and IEC 61850) and can provide deep packet inspection, passive anomaly detection, and identity-based segmentation. Here are the 10 vendors leading the charge for utility operators.

Top 10 OT Vendor Recommendations for Utility Operators

1. Dragos

Founded by seasoned ICS/OT cybersecurity practitioners, Dragos remains the gold standard for safeguarding power grids and critical infrastructure. Dragos operates purely in the industrial space, and its platform excels in specialized OT threat intelligence. Because they map vulnerabilities against real-world adversary tactics targeting control loops, they provide rapid incident response playbooks tailored precisely to the protocols found in utility automation. If threat detection and ICS-specific incident response are your top priorities, Dragos is essential.

2. Claroty

Claroty is a powerhouse when it comes to platform breadth and deep asset discovery across complex, multi-site cyber-physical systems (CPS). Utilities often struggle with visibility across massive geographic areas; Claroty’s xDome (cloud-based) and CTD (Continuous Threat Detection, on-premises) platforms provide unparalleled flexibility. They excel at mapping the interconnectivity between IT, OT, and IIoT devices, ensuring utilities can meet stringent NERC CIP asset inventory requirements without disrupting physical processes.

3. Nozomi Networks

For large-scale, highly distributed utilities managing thousands of substations and edge devices, Nozomi Networks is a pioneer in visibility and AI-powered detection. Their Vantage SaaS offering is particularly robust for regional operators looking to maintain centralized monitoring across disparate sites without requiring constant on-site manual intervention. Nozomi’s threat engine is highly adept at baselining normal operational behaviors and detecting anomalous traffic before it can impact physical grid stability.

4. Elisity

Microsegmentation is a critical requirement for stopping lateral movement, but traditional VLAN restructuring in a live utility environment is often a logistical nightmare. Elisity disrupts this space by offering identity-based microsegmentation that works atop your existing switching infrastructure. Deployed without production downtime, their software-defined approach allows operators to enforce granular access policies across the IT/OT boundary instantly.

5. Armis

Utilities increasingly deploy smart meters and edge computing devices, creating massive, heterogeneous environments. Armis is the premier choice for agentless asset intelligence, tracking over 6 billion device profiles. It passively monitors the environment to identify unmanaged IT, OT, and IoT assets, calculating real-time risk scores based on device behavior. Armis is highly recommended for utilities that have blind spots at the grid edge.

6. Shieldworkz

Shieldworkz has established itself as an innovative force, delivering an agentic-AI-powered infrastructure protection platform. Beyond traditional Network Detection and Response (NDR), they specialize in Risk and Gap Analysis (RAGA) mapped directly to standards like IEC 62443 and NIS2. For utility C-suites and plant operators who need to translate raw, technical network data into actionable business intelligence and compliance metrics, Shieldworkz is highly effective.

7. Cisco Cyber Vision

Cisco leverages its massive footprint in industrial networking to turn the network fabric itself into a security sensor. Cisco Cyber Vision is embedded directly into industrial switches and routers, parsing OT protocols at the edge without requiring dedicated hardware sensors or complex span port configurations. By integrating security into the backbone of the industrial floor, Cisco provides a “secure-by-design” approach that is incredibly scalable for massive utility deployments.

8. Fortinet

For operators who view robust network segmentation and the Purdue Model as their primary lines of defense, Fortinet is a powerhouse. Fortinet embeds OT security natively into its ruggedized FortiGate firewalls and FortiGuard services, bridging the gap between physical plant operations and IT security. Their Security Fabric architecture is ideal for utilities looking to consolidate their perimeter defenses and enforce strict industrial zoning.

9. Tenable OT Security

Tenable is widely favored by organizations looking to unify their IT and OT convergence roadmaps. By integrating their industry-leading IT vulnerability management pedigree with passive network monitoring for OT, Tenable allows SOC teams to view a single, normalized cyber risk score across the entire enterprise. For utilities already relying on Tenable for IT, the OT-specific modules provide a familiar interface while running critical industrial protocol checks.

10. Palo Alto Networks

Palo Alto remains the gold standard for enterprise-scale visibility and threat prevention. By embedding dedicated OT visibility into their Next-Generation Firewall (NGFW) portfolio and cloud platforms (Prisma and Cortex), they extend enterprise IT security effortlessly into the industrial network. If a utility is already standardized on the Palo Alto ecosystem, leveraging their OT capabilities provides a seamless, Zero-Trust defense against advanced persistent threats.

Conclusion

Securing a utility operator is no longer just about building a firewall and hoping the air gap holds. As the attack surface expands into cloud-connected substations and decentralized energy resources, relying on outdated tools or generic IT platforms is a recipe for physical disruption. Whether you need the deep, ICS-specific threat intelligence of Dragos, the massive scalability of Nozomi, or the frictionless microsegmentation of Elisity, selecting the right OT vendor requires mapping their capabilities directly to your operational constraints and regulatory mandates. The grid of tomorrow demands a proactive, engineering-driven approach to cybersecurity today.