{ "slug": "ot-security-platforms", "name": "OT security platforms", "title": "Best OT Security Platforms in 2026", "category": "industrial-manufacturing", "filter": null, "available_filters": [ "web" ], "page": "https://listme.name/best/ot-security-platforms", "json": "https://listme.name/api/v1/lists/ot-security-platforms.json", "updated": "2026-10-10", "intro": "OT security products differ in how they see industrial networks, which standards they map to and whether they sell threat research or managed services. This ranking favors OT-specific depth and clear deployment options, then standards mapping. Broader exposure platforms rank lower for buyers who want an OT-only product.", "criteria": [ "OT asset visibility and passive monitoring", "Threat detection and response services", "Standards mapping and compliance reporting", "Deployment options and data control", "Scope for OT-only buyers" ], "specs": [ { "key": "delivery", "label": "Delivery model", "type": "text" }, { "key": "standards", "label": "Standards and certifications", "type": "text" }, { "key": "threat_intel", "label": "Threat intelligence", "type": "text" } ], "how_to_choose": [ { "point": "Deployment", "detail": "Pick on-premise sensors for plants with restricted networks. Cloud consoles suit multi-site teams. Claroty, Nozomi and Tenable offer both." }, { "point": "Standards", "detail": "Check the IEC 62443 and NERC CIP mappings your auditors need, since not every vendor lists them on its product page." }, { "point": "Services", "detail": "Managed monitoring and incident response help teams without an in-house SOC. Dragos lists Managed OT Watch, and Nozomi lists professional services." }, { "point": "Threat intelligence", "detail": "Feeds differ by vendor. Nozomi cites Mandiant, Dragos runs WorldView, and Tenable cites Tenable Research." }, { "point": "Existing vendors", "detail": "If you already run Fortinet or Tenable tools, their OT modules may fit existing tooling and staff skills." } ], "faq": [ { "q": "Which OT security vendor is the most specialized?", "a": "Dragos, Nozomi Networks and Claroty are the most OT-focused vendors in this list, with products built around industrial networks. Choose by deployment model, managed service needs and the standards your auditors use." }, { "q": "Which OT security tools can run on-premise?", "a": "Claroty, Nozomi Networks and Tenable say their platforms can run on-premise, and Radiflow describes in-house SOC use. Fortinet sells network appliances. Microsoft Defender for IoT lists on-premises options. The Dragos pages do not describe a deployment model, so ask the vendor directly." }, { "q": "Do these products map to IEC 62443?", "a": "Nozomi Networks, Dragos, Tenable, Radiflow and Armis list IEC 62443 on their pages. Fortinet lists IEC 62443-4-1 certification for its products, and the Claroty platform page does not list the standard." }, { "q": "Which OT vendors offer managed monitoring?", "a": "Dragos lists Managed OT Watch and incident response, and Nozomi Networks lists professional services and a partner network for deployment. Confirm what the managed scope covers before signing a contract." } ], "entries": [ { "rank": 1, "score": 93, "verdict": "OT and xOT specialist with its own threat intelligence, Managed OT Watch and incident response. The platform page gives no deployment model, so ask about sensors and hosting before comparing it with rivals.", "best_for": "Operators wanting managed OT detection and response", "spec": { "delivery": "Platform plus managed service", "standards": "IEC 62443, NERC CIP, NIS2", "threat_intel": "xOT threat intelligence (WorldView)" }, "product": { "slug": "dragos", "name": "Dragos", "kind": "web", "website": "https://www.dragos.com/", "page": "https://listme.name/software/dragos", "tagline": "OT and xOT cybersecurity with threat intelligence and managed services", "summary": "Dragos is an OT cybersecurity company offering an xOT platform for asset visibility, threat detection, vulnerability management and response. It publishes threat intelligence through Dragos WorldView and sells Managed OT Watch monitoring and incident response. Its compliance pages cover IEC 62443, NERC CIP and NIS2.", "developer": "Dragos", "platforms": [ "web" ], "pricing": "contact", "price_note": "Quote-based; no list prices on the product pages", "free_to_use": false, "open_source": false, "strengths": [ "Dedicated OT and xOT focus, not a general security suite", "Own threat intelligence through WorldView", "Managed OT Watch and incident response services", "Assessments, red team and tabletop exercises" ], "limits": [ "Platform deployment model is not described on its pages", "Pricing is not published" ], "checked": "2026-10-10", "connected_to_publisher": false } }, { "rank": 2, "score": 92, "verdict": "OT and IoT visibility with Guardian sensors, a Vantage console on-prem or in the cloud, and Mandiant-powered threat intelligence. Its feature set is split across many product names, which makes scoping harder.", "best_for": "Plants needing OT and IoT asset visibility", "spec": { "delivery": "Sensors with cloud or on-prem console", "standards": "IEC 62443, NERC CIP, NIS2", "threat_intel": "Vantage IQ, powered by Mandiant" }, "product": { "slug": "nozomi-networks", "name": "Nozomi Networks", "kind": "web", "website": "https://www.nozominetworks.com/", "page": "https://listme.name/software/nozomi-networks", "tagline": "OT and IoT security with asset visibility, threat detection and AI analysis", "summary": "Nozomi Networks makes OT and IoT security products for asset inventory, threat detection, vulnerability management and risk analysis. Its platform uses sensors and a Vantage console that can run in the cloud or on-premise. It lists ISA/IEC 62443, NERC CIP and NIS2 among its compliance areas.", "developer": "Nozomi Networks", "platforms": [ "web", "self-hosted" ], "pricing": "contact", "price_note": "Quote-based; no list prices on the product pages", "free_to_use": false, "open_source": false, "strengths": [ "Sensors cover OT, IoT and wireless networks", "Threat intelligence powered by Mandiant", "Professional services and a certified partner network", "On-prem, cloud or hybrid deployment" ], "limits": [ "Prices and package sizes are not published", "Feature set is split across many product names" ], "checked": "2026-10-10", "connected_to_publisher": false } }, { "rank": 3, "score": 91, "verdict": "Passive monitoring, asset inventory and exposure management for industrial, healthcare and commercial sites, on-premise or in the cloud. Its platform page does not list IEC 62443 or NERC CIP, so confirm standards during evaluation.", "best_for": "Industrial and healthcare sites needing passive discovery", "spec": { "delivery": "On-premise or cloud", "standards": "Not listed on platform page", "threat_intel": "Team82 research team" }, "product": { "slug": "claroty", "name": "Claroty", "kind": "web", "website": "https://claroty.com/", "page": "https://listme.name/software/claroty", "tagline": "Cyber-physical systems security for industrial, healthcare and commercial sites", "summary": "Claroty is a security platform for cyber-physical systems across industrial networks, healthcare and commercial sites. It provides asset inventory, threat detection, exposure management and secure remote access, with passive monitoring for discovery. The platform can be deployed on-premise or in the cloud.", "developer": "Claroty", "platforms": [ "web", "self-hosted" ], "pricing": "contact", "price_note": "Quote-based; no list prices on the product pages", "free_to_use": false, "open_source": false, "strengths": [ "Passive monitoring and safe queries for discovery", "On-premise or cloud deployment", "Team82 research team listed on the homepage", "Separate offers for industrial, healthcare and commercial sites" ], "limits": [ "Standards mapping is not listed on the platform page", "No list prices on the product pages" ], "checked": "2026-10-10", "connected_to_publisher": false } }, { "rank": 4, "score": 86, "verdict": "Passive OT discovery and compliance mapping to IEC 62443, NERC CIP and NIST, with cloud, on-prem or hybrid deployment. It is part of a wider exposure platform, so it suits teams already using Tenable tools.", "best_for": "Teams unifying OT and IT exposure management", "spec": { "delivery": "Cloud, on-premises or hybrid", "standards": "IEC 62443, NERC CIP, NIST, ISO 27001", "threat_intel": "Tenable Research intelligence" }, "product": { "slug": "tenable-one-ot-exposure", "name": "Tenable One OT Exposure", "kind": "web", "website": "https://www.tenable.com/products/ot-security", "page": "https://listme.name/software/tenable-one-ot-exposure", "tagline": "OT asset discovery and exposure management in the Tenable One platform", "summary": "Tenable One OT Exposure is a unified OT security product from Tenable for converged OT and IT environments. It inventories OT assets, maps risk to security standards and uses passive network monitoring. It can be deployed in the cloud, on-premises or in a hybrid setup.", "developer": "Tenable", "platforms": [ "web", "self-hosted" ], "pricing": "contact", "price_note": "Quote-based; no list prices on the product page", "free_to_use": false, "open_source": false, "strengths": [ "Passive network monitoring with a do-no-harm approach", "Cloud, on-premises and hybrid deployment", "Maps findings to IEC 62443, NERC CIP and NIST", "Part of a wider exposure management platform" ], "limits": [ "Part of a broader product line, not an OT-only vendor", "No list prices on the product page" ], "checked": "2026-10-10", "connected_to_publisher": false } }, { "rank": 5, "score": 84.5, "verdict": "OT security with endpoint, network and inspection products, and Windows endpoint coverage back to Windows 2000. Pricing is quote-based, and the product set is sold as one architecture rather than one appliance.", "best_for": "Plants with legacy Windows endpoints and OT networks", "spec": { "delivery": "Endpoint software and network hardware", "standards": "Not stated on the home page", "threat_intel": "Shared threat intelligence across products" }, "product": { "slug": "txone", "name": "TXOne Networks", "kind": "app", "website": "https://www.txone.com/", "page": "https://listme.name/software/txone", "tagline": "OT security with network, endpoint and inspection products", "summary": "TXOne Networks is an OT security company that sells network, endpoint and inspection products for industrial control systems. Its Stellar endpoint product covers Windows systems from Windows 2000 through Windows 11, and its Edge product adds network security with a hardware bypass that the site says avoids disruption.", "developer": "TXOne Networks", "platforms": [ "windows", "linux", "self-hosted" ], "pricing": "contact", "price_note": "Quote-based; proof-of-value assessment offered on request", "free_to_use": false, "open_source": false, "strengths": [ "Stellar endpoint protection covers Windows 2000 through Windows 11", "Network, endpoint and inspection products sold as one architecture", "Technical proof of value and security assessments offered before purchase" ], "limits": [ "No list prices, and scope is set through a sales process" ], "checked": "2026-10-10", "connected_to_publisher": false } }, { "rank": 6, "score": 84, "verdict": "Passive OT and IoT monitoring offered as SaaS or on-prem, with framework mapping to IEC 62443, NIST CSF and ISO 27001. Its scope also covers IT and medical assets, so OT-only buyers should check the OT module.", "best_for": "Passive OT and IoT monitoring with SaaS or on-prem choice", "spec": { "delivery": "SaaS or on-prem Centrix versions", "standards": "IEC 62443, NIST CSF, ISO 27001, NIS2", "threat_intel": "Armis Labs research" }, "product": { "slug": "armis", "name": "Armis", "kind": "web", "website": "https://www.armis.com/", "page": "https://listme.name/software/armis", "tagline": "OT, IoT and medical device security with passive monitoring", "summary": "Armis is a cyber exposure management company whose Centrix platform includes OT and IoT security, offered as SaaS and on-prem. Its OT page describes passive monitoring of OT, IoT and ICS assets and framework mapping to IEC 62443, NIST CSF and ISO 27001.", "developer": "Armis", "platforms": [ "web" ], "pricing": "contact", "price_note": "Quote-based; listed as SaaS and on-prem versions", "free_to_use": false, "open_source": false, "strengths": [ "Passive network monitoring of OT and IoT assets", "Framework mapping to IEC 62443, NIST CSF and ISO 27001", "SaaS and on-prem versions of the OT and IoT product" ], "limits": [ "Scope spans IT, medical and OT, so it is broader than OT-only tools", "No list prices on the pages read" ], "checked": "2026-10-10", "connected_to_publisher": false } }, { "rank": 7, "score": 83.5, "verdict": "Strong for segmenting OT networks with firewalls and switch-port controls, and it suits teams already on Fortinet gear. Its OT page leads with network controls, not asset inventory, and IEC 62443-4-1 covers development only.", "best_for": "Fortinet-based networks that need OT segmentation", "spec": { "delivery": "Appliances and FortiGuard subscriptions", "standards": "IEC 62443-4-1 ML2 certification", "threat_intel": "FortiGuard industrial subscriptions" }, "product": { "slug": "fortinet-ot-security", "name": "Fortinet OT Security Platform", "kind": "web", "website": "https://www.fortinet.com/solutions/ot-security", "page": "https://listme.name/software/fortinet-ot-security", "tagline": "OT network segmentation and threat protection from Fortinet firewalls and switches", "summary": "Fortinet OT Security is the operational technology offer in Fortinet's security platform. It segments industrial networks with FortiGate firewalls, adds switch port security and secure remote access, and uses FortiGuard industrial security subscriptions. It is listed alongside Fortinet's ruggedized products.", "developer": "Fortinet", "platforms": [ "web" ], "pricing": "contact", "price_note": "Quote-based; product demo and sales contact on the page", "free_to_use": false, "open_source": false, "strengths": [ "Segmentation and switch-port security from one vendor", "Fits teams already running Fortinet networking", "Ruggedized hardware for harsh plant environments", "Free product demo and service options listed" ], "limits": [ "Its OT page leads with firewalls and switches rather than asset inventory", "IEC 62443-4-1 certifies development, not site security" ], "checked": "2026-10-10", "connected_to_publisher": false } }, { "rank": 8, "score": 81.5, "verdict": "Azure-based OT and IoT monitoring with cloud, on-premises and hybrid options and a path into security operations centers. It is subscription-billed and suits teams that already run Microsoft cloud services.", "best_for": "OT monitoring for teams on Microsoft Azure", "spec": { "delivery": "Azure cloud with on-premises options", "standards": "Not stated in the docs read", "threat_intel": "Not stated in the docs read" }, "product": { "slug": "defender-for-iot", "name": "Microsoft Defender for IoT", "kind": "web", "website": "https://learn.microsoft.com/en-us/azure/defender-for-iot/", "page": "https://listme.name/software/defender-for-iot", "tagline": "Azure-based threat detection for OT and IoT networks", "summary": "Microsoft Defender for IoT is an Azure cloud security service for threat detection on OT and IoT networks. Its OT network monitoring has cloud, on-premises and hybrid deployment options, and it provides device inventories and alerts that feed OT threat monitoring in a security operations center.", "developer": "Microsoft", "platforms": [ "web", "self-hosted" ], "pricing": "subscription", "price_note": "Subscription billing for OT and enterprise IoT monitoring plans", "free_to_use": false, "open_source": false, "strengths": [ "Cloud, on-premises and hybrid deployment options", "OT threat monitoring feeds into a security operations center", "Device inventories, alerts and zero trust guidance for OT" ], "limits": [ "Needs an Azure subscription, so it suits Microsoft-centered teams" ], "checked": "2026-10-10", "connected_to_publisher": false } }, { "rank": 9, "score": 80, "verdict": "Specialist OT threat detection and risk management for ICS and SCADA, designed for in-house SOCs and MSSPs. Its product set is narrower than the platform vendors above, and its homepage shows no prices.", "best_for": "In-house SOCs and MSSPs covering ICS networks", "spec": { "delivery": "In-house SOC or MSSP-run", "standards": "IEC 62443, NIS2, NIST CSF", "threat_intel": "Radiflow Labs research" }, "product": { "slug": "radiflow", "name": "Radiflow", "kind": "web", "website": "https://www.radiflow.com/", "page": "https://listme.name/software/radiflow", "tagline": "OT threat detection and risk management for ICS and SCADA networks", "summary": "Radiflow is an OT cybersecurity company for ICS and SCADA networks. Its products cover threat detection with iSID, risk management with CIARA, central management with iCEN and active scanning. It lists NIS2, IEC 62443 and NIST CSF compliance, and it sells to in-house SOCs and MSSPs.", "developer": "Radiflow", "platforms": [ "web", "self-hosted" ], "pricing": "contact", "price_note": "Demo or contact form; no prices on the homepage", "free_to_use": false, "open_source": false, "strengths": [ "Designed for both in-house SOCs and MSSPs", "Covers NIS2, IEC 62443 and NIST CSF", "Radiflow Labs research and white papers", "Industry pages cover power, maritime and water" ], "limits": [ "Smaller product set than the platform vendors above", "No prices or package sizes on the homepage" ], "checked": "2026-10-10", "connected_to_publisher": false } }, { "rank": 10, "score": 77, "verdict": "Device visibility across IT, IoT, OT and medical assets, with segmentation gap checks and automated response. Its scope is wider than OT alone, and the homepage lists no prices.", "best_for": "Device visibility across mixed IT, IoT and OT estates", "spec": { "delivery": "Web dashboard", "standards": "Not stated on the home page", "threat_intel": "Not stated on the home page" }, "product": { "slug": "ordr", "name": "ORDR", "kind": "web", "website": "https://ordr.net/", "page": "https://listme.name/software/ordr", "tagline": "Device security for IT, IoT, OT and medical assets with segmentation", "summary": "ORDR is a security platform for connected devices that discovers devices across IT, IoT, OT and IoMT environments, assesses their risk, and supports segmentation and automated response. Its ORDR IQ assistant answers device questions in plain language from a web dashboard.", "developer": "ORDR", "platforms": [ "web" ], "pricing": "contact", "price_note": "No list prices on the homepage; try and demo links are offered", "free_to_use": false, "open_source": false, "strengths": [ "One device inventory across IT, IoT, OT and IoMT assets", "Segmentation gap checks and policy updates for connected devices" ], "limits": [ "Scope covers medical and IoT devices as well as OT" ], "checked": "2026-10-10", "connected_to_publisher": false } } ], "notes": [ "Scores are editorial, 0 to 100. Entries with product.connected_to_publisher true are made by or connected to the publisher and receive a disclosed ranking lift: https://listme.name/methodology" ], "source": "https://listme.name", "license": "Free to read and cite with attribution to listme.name.", "docs": "https://listme.name/developers" }