Best IoT Security Services Providers

Armis Centrix finds and classifies assets without installing software on each device. It watches network traffic and uses safe active queries in native industrial protocols to identify legacy and unmanaged equipment. That agentless method matters where an agent cannot be installed on a controller or a medical device.

• The platform ranks vulnerabilities by exploitability, device criticality and operational impact, rather than by a raw severity score alone.
• It maps attack paths and supports secure remote access with multi-factor authentication and just-in-time access.
• Armis offers cloud, on-premises and hybrid deployment.
• One limit: the vendor does not publish a price, so the total depends on asset count and modules.

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Claroty xDome is a cloud platform for cyber-physical systems, covering industrial OT, healthcare and commercial IoT in one system. The foundation is xDome Essentials, which covers asset visibility, exposure management, network protection and threat detection. Claroty states that xDome covers 450+ protocols, and it uses deep packet inspection to build a detailed inventory.

• The platform groups exposures by production line, system and business purpose, so a team can focus on faults that would cause the worst operational im
• It supports micro-segmentation, with device clustering that forms zones aligned with IEC 62443.
• One limit: xDome is modular, so the price changes when you add modules beyond Essentials, and the vendor does not publish a list price.

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Nozomi Networks Guardian is the on-site sensor line, and Vantage is the cloud layer that pulls Guardian, Guardian Air and Arc sensor data into one view. Guardian sensors sit on a mirror port or tap, learn a behaviour baseline from network traffic, and flag anomalous traffic and unusual process values. Vantage aggregates that data across sites, with risk scoring that can be tuned to how an organisation calculates risk.

• A local Guardian keeps working when a site is isolated, while Vantage gives a central team a view across every connected site.
• Vantage IQ adds AI-driven analytics in the cloud, and threat intelligence feeds are distilled into threat cards.
• One limit: the vendor does not publish a price, and the total is driven by asset count and the Vantage bundle, so a quote must state the asset band.

Visit Nozomi Networks Guardian →

Dragos Platform is built for industrial control systems and OT networks, with a focus on visibility, vulnerability management, threat detection and response. It monitors 600+ ICS protocols natively, using both active and passive collection, and it analyses protocols, network traffic, data historians, host logs and asset data. That protocol depth is the core difference from a general IT security tool, which may see a controller as an unknown device.

• Dragos uses a Now, Next, Never framework to turn vulnerability risk into operational impact.
• Dragos states that only 3 to 6 percent of OT vulnerabilities require immediate action, so the framework helps a small team focus on faults that threat
• The platform also offers expert-authored response playbooks and AI-assisted investigation.
• One limit: there is no published price, and deployment needs sensors, a SiteStore and a CentralStore.

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Microsoft Defender for IoT is the clearest priced option in this list. The Microsoft pricing page lists the enterprise IoT device license add-on at $0.85 per device per month with an annual commitment. It is an add-on for Microsoft Defender for Endpoint P2, licensed per enterprise IoT device.

• The same page states that Defender for IoT for enterprise is included with Microsoft 365 E5, with up to five enterprise IoT devices protected per user
• The platform offers agentless network detection and response across diverse IoT, OT and industrial control system devices, and it works with Microsoft
• That link to Sentinel is the main reason to choose it if your team already runs Microsoft security.
• One limit: the $0.85 figure is the enterprise IoT device add-on, not a single price for every OT deployment.

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Palo Alto Networks IoT Security is designed to sit on the firewall estate a team already runs. The vendor page states that you enable IoT Security on the ML-Powered Next-Generation Firewall within minutes, with no configuration changes and no new network infrastructure. It uses machine learning and App-ID technology to identify and classify IoT and OT devices, including devices that have never been seen before.

• Palo Alto states that 30 percent of most enterprises are made up of unmanaged IoT and OT devices.
• Once devices are identified, the platform assesses risk, applies automated policy enforcement with a Device-ID policy construct, and uses Next-Generat
• Deployment covers PA-Series physical firewalls, VM-Series virtual firewalls and Prisma Access.
• That firewall link is both the strength and the limit: a team with Palo Alto firewalls can add IoT cover without a new sensor estate.

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Forescout Vistaro Platform starts with eyeSight, which discovers, classifies and assesses every connected asset, managed or unmanaged, across IT, OT, IoT and medical devices. The vendor page states that eyeSight uses over 30 passive and active monitoring techniques, so it can find devices that never run an agent and never appear in a standard IT inventory. That matters in hospitals, where medical devices cannot be touched, and in plants, where controllers sit outside normal IT management.

• The wider platform adds eyeInspect for OT and air-gapped environments, with deep packet inspection of 350+ industrial protocols and thousands of OT-sp
• One limit: the platform is sold in bundles with different module mixes, so a buyer must check which bundle includes segmentation, cloud management and

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Tenable One OT Exposure is the OT part of the Tenable One exposure management platform, built for converged OT and IT environments. It builds a complete inventory of OT, IoT and IT assets, including dormant programmable logic controllers, shadow IT and unmanaged IoT devices. It uses Safe Active Query to uncover firmware, backplane details, lifecycle data and known vulnerabilities, using vendor-approved methods in native protocols.

• The platform prioritises findings by real-world threat intelligence, exploitability and business impact, rather than by severity alone.
• Tenable states that its Vulnerability Priority Rating uses data science to measure real-world exploitability, while CVSS measures theoretical severity
• It also monitors configuration changes and anomalies in real time, and maps posture to NERC CIP, NIST, ISO 27001, PCI DSS and IEC 62443.
• One limit: Tenable does not publish a price for OT Exposure, and licensing is asset-based, so the quote must state the asset count.

Visit Tenable One OT Exposure →