The Best Utility Cybersecurity Companies in 2026

Updated November 2026

Quick answer: The best utility cybersecurity companies in 2026 include Asimily, Dragos, Claroty, Nozomi Networks, Forescout, Armis, Tenable, Ordr, and Fortinet. Asimily fits electric, water, and gas utilities that need visibility into substations and pump stations, priorities based on exploitability, and audit-ready configuration records. Dragos fits utilities that want threat intelligence and incident response, and Tenable fits teams that manage OT and IT vulnerabilities in one tool.

A utility security team gets all the standard, hard-to-protect IT devices plus a wide array of attractive targets for cybercriminals. They must protect remote terminal units (RTUs), programmable logic controllers (PLCs), protection relays, and SCADA systems in substations, pump stations, and compressor stations, much of it installed years ago and rarely touched, without interrupting power, water, or gas delivery. Teams are often small, facilities are spread across a service territory, and the operations group holds an effective veto over any change that could cause an outage.

A good security partner for that environment inventories the network down to the field devices wired behind each controller and the farthest flung sensor. The security platform should show which exposures an attacker could actually use on your network, and help reduce the risk of an unplanned outage.

This guide covers six criteria for utility-ready platforms in substations, treatment plants, and pipeline facilities, a side-by-side view of the companies that appear most often in utility evaluations, and where each one fits. Asimily publishes this guide. We include ourselves, and our descriptions draw on each company’s public positioning, how it approaches the problem, and our own research and conversations with market participants.

The Best Utility Cybersecurity Companies at a Glance

Asimily appears first as the publisher; the order of the other companies is not a ranking.

Company	Primary Approach	Best Fit For
Asimily	Agentless visibility, ATT&CK-based exploitability analysis that separates risk from severity, and Segmentation Orchestration with Policy Simulation across IoT, IIoT, OT, IoMT, and IT, plus Configuration Control for taking snapshots of certain asset types.	Utilities that need to move from a unified asset inventory to enforced zones and audit-ready configuration records without an outage
Dragos	OT threat detection, industrial threat intelligence, playbooks to speed human response, and incident response services	Utilities that put threat intelligence first and want an OT incident response partner they can call
Claroty	Cyber-physical systems protection: asset management, exposure management, network protection, secure access, and threat detection	Large utilities standardizing OT security across many facilities that need secure remote access for vendors
Nozomi Networks	OT and IoT visibility, continuous monitoring, and threat and anomaly detection	Operations-led programs that value close ties to grid and automation vendors
Forescout	Device discovery, classification, and network access control across IT, OT, and IoT	Teams that want visibility and access control from one vendor, independent of their switch vendor’s platform
Armis	Agentless asset intelligence and exposure management across IT, OT, IoT, and cloud	Utilities standardized on ServiceNow workflows; cost-sensitive
Tenable	OT vulnerability management with passive monitoring and active device queries, inside Tenable One	Teams that want OT findings in the same tool they use for IT vulnerability management
Ordr	AI-driven asset profiling and least-privilege policy across converged IT and OT	Lean teams that want AI-assisted policy applied through existing firewalls and switches
Fortinet	Firewalls and secure networking with OT protocol support	Utilities consolidating network and security on one vendor

What to Look for in a Utility Cybersecurity Company

Utility networks break assumptions that most security tools are built on: field devices can’t take agents and tolerate little extra traffic, maintenance windows are booked weeks out, and a blocked connection can cut service to customers. Use these six criteria to test whether a platform was built for substations, plants, and field networks.

1. Visibility Into Substations, Plants, and Field Facilities

A substation or pump station cannot be protected until its assets are known, and many tools stop short. They see the RTU or PLC but nothing about the relays, meters, and instruments behind it, serially connected or not. Ask each vendor to show discovery of those assets and the systems around them in your own environment. The topology view should show every facility in a way a small team can grasp quickly. Those assets’ data should be captured agentlessly and safely against live operations. Getting there can take careful analysis of network traffic in one place and knowledge of a device vendor’s equipment plus active queries, run only where a device tolerates them, in another. Ask what each remote facility needs in hardware, too: a sensor sized for a large plant can add cost at a small pump station without adding coverage. The inventory should also cover the IoT and IT assets that may share the operational network, because those assets can bridge the corporate network and the control network.

2. Prioritization by Exploitability Likelihood and Service Impact

A CVSS base score describes a vulnerability in general. It says nothing about whether the relay carrying that CVE sits behind a firewall or on a flat network. Look for analysis that determines whether a vulnerability is actually exploitable on a specific device in your topology, and that weighs each device’s role in keeping power, water, or gas flowing. The result should be a short list of decisions, each with a documented reason for its place in line.

3. Zone Enforcement You Can Prove Before You Deploy

Many utilities already own a NAC, such as Cisco ISE, or segmentation-capable firewalls, yet segmentation projects stall because no one can say with confidence what a new policy will block. Utility networks now carry more assets and flows than a person can trace by hand, so mapping them takes purpose-built segmentation software. Look for a platform that groups assets into zones from observed traffic, understands conduits, generates policy in your NAC’s or firewall’s native format, and previews its impact against real traffic before anything is applied. It should then keep that policy current as assets are added, moved, or patched. Re-addressing field devices is rarely an option, so the approach has to work on the network you already run.

4. Mitigation for RTUs and PLCs You Can’t Patch

A controller that still runs a substation or treatment process stays in service long after its vendor stops issuing patches. Evaluate whether the platform recommends targeted mitigations, such as disallowing specific uses, segmentation, disabling unused services, or changing default credentials, that close the exposure and fit inside an existing maintenance window. Patching the assets that can safely take updates, such as supported IP cameras, shrinks the list that needs compensating controls.

5. Continuous Monitoring and Forensic Evidence

Threat detection should understand the protocols your control networks run, such as DNP3, Modbus, and IEC 61850, including GOOSE messaging, among many others, and flag insecure configuration drift alongside anomalous behavior. Ask whether you can capture packets from a specific device during an incident, so the investigation starts with evidence rather than reconstruction.

6. Audit Evidence on Demand

Electric utilities in North America that own or operate bulk electric system assets answer to NERC CIP, including configuration baselines and change management under CIP-010 and internal network security monitoring under CIP-015 (FERC Order No. 907). U.S. community water systems serving more than 3,300 people must complete AWIA Section 2013 risk and resilience assessments, which must cover the electronic, computer, and automated systems the utility runs (EPA). Designated pipelines follow TSA security directives, and many utilities align to ISA/IEC 62443 zones and conduits. Each asks for the same proof: a current asset inventory, a documented risk assessment, and a record of which controls are enforced where and what changed. The platform should keep that record current continuously, not assemble it the week before an audit.

The Best Utility Cybersecurity Companies in 2026

1. Asimily

Asimily is the Proactive Cyber Asset Defense Platform for IoT, OT, IoMT, and IT. For utilities, it brings substations, plants, and corporate systems into one inventory, so a small team can see which assets carry the most risk and help contain them.

Discovery is agentless: passive analysis of control traffic, plus targeted, low-impact queries to OT and IoT devices where safe. The Asimily Edge collector, an appliance or virtual machine, caps outbound traffic at a limit you set for each facility. ATT&CK Analysis estimates the likelihood that each device can be compromised, weighted by factors such as network segmentation, patching status, and operational context, so limited maintenance windows can go where they reduce the most risk.

Segmentation Orchestration builds and simulates zone policy, then applies it through your existing NAC and firewalls. Configuration Control keeps configuration snapshots, detects drift, and restores known good states, which supports the configuration baselines and change records NERC CIP-010 asks for. Native packet capture from a specific device helps shorten investigations. Risk Simulator models the risk reduction of each mitigation before any change is made, and IoT Patching delivers firmware and password updates for supported asset types. Deployment is cloud or on-premises.

Recognition: 2026 Merit Awards winner, and rated 4.9 out of 5 on Gartner Peer Insights (55 reviews, October 2026).

Best fit for: Utilities needing visibility across all their facilities, exploitability-based priorities, and zone policy validated before enforcement.

What to evaluate: Discovery at one of your substations or pump stations, the documented reason behind each prioritized device, and Policy Simulation against your own traffic.

2. Dragos

Dragos specializes in industrial cybersecurity, with OT threat detection, intelligence on threat groups that target industrial operators, playbooks, and incident response services. Its Community Defense Program offers resources to qualifying small electric, water, and gas utilities in the U.S. and Canada. Accenture’s majority investment closed in September 2026 (SecurityWeek), and the company still operates as Dragos.

Best fit for: Utilities that prioritize threat intelligence and want an OT incident response partner available when needed.

What to evaluate: Whether it inventories the cameras, badge readers, and IT systems on your control network, and how a detection turns into an enforced control.

3. Claroty

Claroty secures cyber-physical systems in industrial, healthcare, and commercial settings. Its platform spans asset management, exposure management, network protection, secure remote access, and threat detection, and the company reports more than 8,000 deployed sites across 40 industries.

Best fit for: Large utilities that want one OT security vendor across many facilities, with secure remote access for vendor technicians.

What to evaluate: How far discovery reaches below the RTU or PLC at your facilities, and how its network protection recommendations turn into enforced policy on the NAC and firewalls you own.

4. Nozomi Networks

Nozomi Networks delivers OT and IoT asset inventory, continuous monitoring, and threat and anomaly detection. Mitsubishi Electric completed its acquisition of the company in January 2026 (Business Wire), and Nozomi lists ABB, GE Vernova, Schneider Electric, and Hitachi Energy as partners.

Best fit for: Operations-led programs that want security monitoring tied closely to their grid and automation vendors.

What to evaluate: How findings are prioritized by exploitability on your specific devices, what the platform does after an alert to reduce exposure, and sensor cost at your smallest facilities.

5. Forescout

Forescout comes from network access control. It discovers and classifies assets across IT, OT, and IoT and adds policy enforcement and automated response on top of that visibility. The platform has carried the Forescout Vistaro name since June 2026 (Forescout).

Best fit for: Utilities that want device visibility and access control from a single vendor, separate from their switch vendor’s platform.

What to evaluate: How the platform previews the impact of an enforcement action on a substation or plant network before it is applied.

6. Armis

Armis Centrix provides agentless asset intelligence and exposure management across IT, OT, IoT, medical devices, and cloud. ServiceNow closed its acquisition of Armis in April 2026 (Verdict), and Armis Centrix is still sold as a standalone product.

Best fit for: Utilities whose IT and security teams work in ServiceNow and want device risk to show up there.

What to evaluate: OT protocol depth in substations and plants, and whether segmentation policy can be created, simulated, and maintained from the same platform.

7. Tenable

Tenable OT Security combines passive monitoring with active querying of industrial devices such as PLCs, and feeds OT findings into Tenable One alongside IT vulnerability management.

Best fit for: Teams that want OT vulnerability management in the same tool they use for IT.

What to evaluate: How findings are prioritized by exploitability on your devices, and how they become enforced controls rather than tickets.

8. Ordr

Ordr’s AI Protect platform profiles each asset by its function, behavior, and communication patterns across converged IT and OT networks. It then generates least-privilege policy for an analyst to approve before it goes out through existing firewalls, NACs, switches, and wireless controllers.

Best fit for: Lean utility teams that want AI-assisted policy creation and natural-language investigation.

What to evaluate: Whether vulnerabilities are ranked by exploitability on your specific devices, and what mitigations it offers when segmentation is not enough.

9. Fortinet

Fortinet’s Security Fabric brings firewalls, secure networking, endpoint protection, and centralized management together, with OT protocol support and ruggedized hardware built for substations and remote facilities.

Best fit for: Utilities consolidating networking and security on a single vendor.

What to evaluate: Which system will supply the asset context and risk priorities that decide your firewall rules.

Other Companies Utilities Consider

Cisco, Palo Alto Networks, Microsoft Defender for IoT, TXOne Networks, and Darktrace also appear in utility evaluations, usually as extensions of existing network or IT security investments. Smaller utilities that need staff augmentation more than a platform often pair one of the companies above with a managed security provider that has OT experience.

Choosing the Right Fit for Your Utility

Start with the constraint that has stalled your program. A team that can’t see what is in its substations and pump stations should test discovery first, and price it per facility: a sensor sized for a large plant can make a small station expensive to cover. A team with findings but no enforcement should test whether the platform can generate, simulate, and maintain policy on the NAC and firewalls it already owns. A team preparing for audits should test how configuration baselines and change records are produced. Run every pilot against your own traffic, and bring in the operations owners who will approve any change.

[Related: OT Security: A Complete Guide to Protecting Operational Technology]

[Related: The Best Critical Infrastructure Cybersecurity Companies in 2026]

[Related: The Best Manufacturing Cybersecurity Companies in 2026]

Frequently Asked Questions About Utility Cybersecurity Companies

What Is the Best Cybersecurity Company for Utilities?

The best fit depends on how mature your program is. Most platforms on this list provide basic visibility. For utilities that also need prioritization based on real exploitability, rather than severity ratings alone, and zone policy simulated against observed traffic before it is enforced, Asimily covers visibility, prioritization, and enforcement in one platform. Dragos, Claroty, and Nozomi Networks are OT specialists, and Fortinet and Cisco extend network security into substations and plants.

Which Cybersecurity Regulations Apply to Electric, Water, and Gas Utilities?

In North America, NERC CIP standards apply to registered entities that own or operate bulk electric system assets; CIP-015-1 adds internal network security monitoring (FERC). In the United States, community water systems serving more than 3,300 people must address cyber systems in AWIA Section 2013 risk and resilience assessments (EPA), and TSA security directives cover designated pipelines. Applicability varies by region, size, and regulator.

How Do Utilities Segment Control Networks Without an Outage?

They map observed connections, group assets into zones, and define the conduits between them, following models such as ISA/IEC 62443. Each policy is validated against real traffic before it is applied, then enforced in stages. Asimily’s Policy Simulation does this, and Continuous Segmentation keeps the NAC policies Asimily pushes current as matching assets are added or stop matching. Many utilities still tie major changes to planned maintenance windows, and a long enough simulation against observed traffic can give operations the confidence to switch a zone policy to enforcement.

What Evidence Do Auditors Ask for on OT Configuration Changes?

Where rules such as NERC CIP apply, auditors commonly look for a baseline configuration for each in-scope system and a record of authorized changes against it. Collect snapshots on a schedule and alert on differences. Asimily’s Configuration Control captures configuration snapshots when set conditions are met, alerts on deviations, and keeps the data needed to restore known good states. A history of snapshots also shows auditors consistent operational security practice.

How Is OT Security Different From IT Security at a Utility?

At a utility, OT security protects substations, treatment plants, and pipelines, where a missed patch matters less than a dropped feeder or a stopped pump. RTUs, PLCs, and protection relays rarely run agents or take routine patches, so utilities rely on agentless visibility, segmentation, and changes validated before they reach operations. The consequences differ as well: a tampered protection relay or chemical feed controller can affect public safety across a whole service territory, while a compromised office server typically does not.

See How Asimily Protects Utility Operations

Asimily gives utilities one agentless inventory across IoT, OT, IoMT, and IT, a short list of the exposures that are actually exploitable, and zone policy simulated against real traffic before it is enforced.

Sources

• FERC Order No. 907, approving CIP-015-1 internal network security monitoring (June 2025)
• EPA, America’s Water Infrastructure Act risk and resilience assessments
• Mitsubishi Electric completes acquisition of Nozomi Networks (Business Wire, January 2026)
• Dragos completes acquisitions following Accenture deal (SecurityWeek, 2026)
• ServiceNow completes Armis deal (Verdict, April 2026)
• Forescout Vistaro platform rename (Forescout, June 2026)