Best OT & ICS Security Tools

Censys provides Attack Surface Management focused on external internet visibility: it continuously scans the public Internet, attributes discovered assets to an organization, and tracks changes in hosts, ports, certificates, services, and exposures. In this category it is known for its Internet-scale dataset, near-real-time exposure monitoring, and evidence-based prioritization of externally reachable risks. It is best suited for security teams that need to discover unknown internet-facing assets, confirm what attackers can actually reach, and route remediation into existing workflows. Censys also sells adjacent products, but this profile is limited to ASM capabilities.

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.

Ermetic provides a CIEM platform that discovers and analyzes human and machine identities, entitlements, and access risks across AWS, Azure, and Google Cloud. Acquired by Tenable in 2023 and rebranded as Tenable CIEM, it combines CIEM with CSPM for contextual visibility into IAM policies, network configurations, storage, and secrets. It exposes overprivileged entitlements, toxic combinations, and enforces least privilege via automated remediation and anomaly detection. Best for multi-cloud enterprises needing unified CNAPP capabilities to manage complex entitlement sprawl without agents.

Frenos is an operational technology (OT) security company that provides a simulated penetration testing platform for industrial and critical infrastructure environments. The platform builds a digital twin of a customer's OT network from existing data such as firewall configurations, asset inventories and known vulnerabilities, then uses an AI reasoning agent to simulate adversary behavior and chain exploits across that model. It can run large numbers of attack path simulations without touching live systems, reducing the risk and downtime of traditional OT penetration testing. The product targets energy, manufacturing, government and healthcare organizations running SCADA, industrial control systems or connected medical devices, and can be deployed on a laptop, on-premises server or in the cloud with data kept on-prem.

Insane Cyber specializes in OT security and industrial control system (ICS) protection through its Valkyrie platform. It provides monitoring, threat hunting, and incident response capabilities specifically designed for rugged, remote, or hard-to-reach industrial environments. The solution addresses the 'visibility gap' in legacy OT networks, replacing passive-only monitors with a more active investigative capability for critical infrastructure.

NetWitness is a comprehensive threat detection and response platform that integrates SIEM, network forensics, endpoint data, and user entity behavior analytics (UEBA). It provides security analysts with deep visibility across the entire attack lifecycle by capturing and analyzing packet-level data alongside logs and endpoint telemetry. The platform is designed for high-scale enterprise environments, replacing fragmented point solutions with a unified workbench for incident investigation and response orchestration.

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.

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.

Connect. Protect. Simplify. At Spharaka Networks Private Limited, we are reimagining the future of cybersecurity through the power of Agentic AI, an intelligent system that learns, reasons, and collaborates alongside human defenders. Our platform connects fragmented security layers, protects enterprise assets proactively, and simplifies threat management across the organization.

TXOne Networks is an OT-native cybersecurity vendor focused on protecting industrial and IoT-connected environments such as factories, utilities, and medical/production sites. In the IoT Security scope, its portfolio centers on device and network protection for operational assets, including inspection of removable media, endpoint defense for legacy and modern OT systems, and inline network controls for industrial protocols. It is best suited for organizations that need to secure brownfield OT/IoT environments without disrupting operations. TXOne also sells adjacent OT security orchestration and threat intelligence components, but its IoT security value is primarily in asset, endpoint, and network protection.

wolfSSL is an embedded cryptography vendor best known for its wolfCrypt engine, wolfSSL TLS library, and wolfHSM key-management framework. In the Encryption & Key Management category, it provides software for protecting keys, offloading sensitive cryptographic operations to HSMs, and supporting standards such as PKCS#11 and AUTOSAR SHE. It is strongest for embedded, automotive, RTOS, and constrained-device environments where small footprint, portable C code, and hardware-backed key handling matter. Adjacent products include TLS, SSH, MQTT, and boot/security tooling, but the core fit here is cryptography and key lifecycle control.

Xage Security is a zero-trust access vendor whose IAM offering centers on identity-based access for mixed IT, OT, and edge environments. In the IAM scope, it provides multi-factor authentication, federation, single sign-on, and policy-based access orchestration across multiple identity providers and local directories. Xage is best suited for industrial, critical infrastructure, and distributed enterprise buyers that need access control across legacy systems, remote sites, and intermittently connected environments. The company also sells adjacent zero-trust and privileged access capabilities, but its IAM value is rooted in layered identity enforcement.