Best OT Security Tools

Claroty positions its platform for cyber-physical systems and IoT/IIoT security, with deployment options in the cloud as xDome or on-premises as Continuous Threat Detection (CTD). In the IoT Security scope, it focuses on discovering connected devices, profiling their communications and firmware, detecting anomalies, and supporting exposure analysis for industrial and other mission-critical environments. It is best suited for organizations that need passive visibility into unmanaged or fragile devices on operational networks, including manufacturing, utilities, healthcare, and other infrastructure operators. Adjacent modules such as secure remote access exist, but the core IoT Security value is asset discovery, monitoring, and threat detection.

We make the industry's most intelligent and intuitive cybersecurity platform for Operational Technology (OT). Customers gain visibility, monitoring, and threat management for the OT, IT, and IoT assets within industrial environments, powered by continuous insights from Dragos's threat intelligence and services team.

Microsoft Defender for Cloud is a multicloud CSPM platform that provides continuous security posture assessment across Azure, AWS, and GCP. It delivers agentless vulnerability scanning, misconfiguration detection, and compliance monitoring against industry benchmarks (CIS, NIST, ISO, PCI-DSS). The platform generates hardening recommendations ranked by risk and includes attack path analysis to identify exploitable chains. Defender for Cloud serves enterprises managing hybrid and multicloud infrastructure seeking unified posture visibility and compliance reporting.

Nozomi Networks delivers an IoT Security solution focused on passive OT and IoT network monitoring to automate device discovery, asset visibility, and threat detection. Their Guardian sensor passively ingests SPAN traffic to decode protocols, identify newly connected assets, and detect anomalies using AI-driven behavioral analysis. The platform prioritizes risks inherent to industrial environments, offering guided remediations to reduce MTTR. Best suited for utilities, manufacturing, and critical infrastructure operators managing complex OT/IoT ecosystems. While they also offer broader OT security capabilities, their IoT solution specifically targets visibility and anomaly detection in heterogeneous device networks.

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SCADAfence is an industrial cybersecurity vendor focused on **OT and IoT security** for large-scale networks, with visibility into ICS/SCADA environments and connected devices. Its platform centers on passive monitoring, asset discovery, threat detection, risk management, and security governance rather than endpoint protection. SCADAfence has been positioned as a market leader in OT security and was acquired by Honeywell in 2023, which places it inside a larger industrial software portfolio. It is best suited for critical infrastructure, manufacturing, and building management teams that need device-level visibility and monitoring across complex industrial networks.

Stormshield Network Security (SNS) is the company’s firewall and NGFW line, aimed at organizations that want perimeter and segmentation controls with integrated inspection, IPS, VPN, and application control. Its product pages describe real-time protection, URL filtering, IP geolocation controls, and multi-WAN routing, which places it in the UTM-style NGFW segment rather than a pure packet-filtering firewall. It is typically positioned for enterprises, public-sector networks, and distributed sites that need on-premises firewall appliances and centralized management.