Best On-Premises Operational Technology (OT) Security Software of 2025

Fortinet stands out as a prominent global entity in the realm of cybersecurity, recognized for its all-encompassing and cohesive strategy aimed at protecting digital infrastructures, devices, and applications. Established in the year 2000, the company offers an extensive array of products and services, which encompass firewalls, endpoint security, intrusion prevention systems, and secure access solutions. Central to its offerings is the Fortinet Security Fabric, a holistic platform that effectively melds various security tools to provide enhanced visibility, automation, and real-time intelligence regarding threats across the entire network. With a reputation for reliability among businesses, governmental bodies, and service providers across the globe, Fortinet places a strong emphasis on innovation, scalability, and performance, thereby ensuring a resilient defense against the ever-evolving landscape of cyber threats. Moreover, Fortinet’s commitment to facilitating digital transformation and maintaining business continuity further underscores its role as a pivotal player in the cybersecurity industry.

Continuous asset discovery, vulnerability management, threat detection, and continuous asset discovery for your Internet of Things and operational technology devices (OT). Ensure IoT/OT innovation by accelerating IoT/OT innovation through comprehensive security across all IoT/OT devices. Microsoft Defender for IoT is an agentless, network-layer security solution that can be quickly deployed by end-user organizations. It works with diverse industrial equipment and integrates with Microsoft Sentinel and other SOC tools. You can deploy on-premises and in Azure-connected environments. Microsoft Defender for IoT is a lightweight agent that embeds device-layer security in new IoT/OT initiatives. Passive, agentless network monitoring allows you to get a complete inventory and analysis of all your IoT/OT assets. This is done without any impact on the IoT/OT networks. Analyze a variety of industrial protocols to identify the device details, including manufacturer, type, firmware level, IP or Media Access Control address.

The Dragos Platform is the most trusted industrial controls systems (ICS) cybersecurity technology. It provides comprehensive visibility of your ICS/OT assets, threats and best-practice guidance on how to respond before a major compromise. Dragos Platform was designed by practitioners and is a security tool that ensures your team has the most current tools to fight industrial adversaries. It was developed by experts who are on the frontlines of fighting, combating, and responding to the most advanced ICS threats. The Dragos Platform analyses multiple data sources, including protocols, network traffic and data historians, host logs and asset characterizations. This gives you unparalleled visibility into your ICS/OT environment. The Dragos Platform quickly detects malicious behavior in your ICS/OT network and provides context to alerts. False positives are reduced for unrivalled threat detection.

GREYCORTEX is one of the main providers of NDR (Network Detection and Response) security solutions for IT and OT (industrial) networks. It ensures their security and reliability with its Mendel solution, which provides perfect visibility into the network and, thanks to machine learning and advanced data analysis, discovers any network anomalies and detects any threats at their early stages.

Network Perception's NP-View is an innovative cybersecurity platform tailored for operational technology (OT) environments, allowing security teams to enhance network visibility through automated topology mapping. This proactive tool identifies access and segmentation risks, supports compliance efforts, and helps maintain a robust security posture without disrupting ongoing operations. As a lightweight and non-invasive solution, NP-View empowers security teams to swiftly pinpoint network vulnerabilities and evaluate risks effectively. It eliminates the necessity for agent installations or modifications to the OT network, making it accessible for both technical and non-technical personnel. Compatible with a variety of firewalls, routers, and switches prevalent in OT settings, NP-View operates seamlessly in an offline mode, ensuring no internet connection is required. The platform offers continuously updated comprehensive network maps, providing an accurate and up-to-date reference for assessing your cybersecurity landscape. This makes NP-View an indispensable tool for organizations striving to fortify their OT networks against potential threats.

Frenos stands out as the pioneering autonomous platform for Operational Technology (OT) security assessment, engineered to proactively evaluate, prioritize, and protect critical infrastructure without interfering with operational activities. Specifically tailored for OT environments, this innovative platform autonomously assesses and addresses risks across all sixteen sectors of critical infrastructure. Leveraging a digital network twin alongside an AI reasoning agent, it meticulously analyzes potential adversarial tactics, techniques, and procedures, delivering contextual and prioritized remediation recommendations that are tailored to OT environments. This advanced methodology empowers organizations to effectively minimize risks and bolster their security posture. Furthermore, Frenos has forged strategic alliances with prominent industry players, including Claroty, Forescout, NVIDIA, Dragos, Palo Alto Networks, Tenable, and Rapid7. Founded with the mission to assist enterprises in protecting their most prized assets—ranging from oil rigs and medical devices to electric substations and financial transaction systems—Frenos is redefining the landscape of OT security. As the threat landscape evolves, this platform continues to adapt, ensuring that organizations remain a step ahead of potential vulnerabilities.