Top 10: Operational Technology (OT) Security Companies
The digital transformation of industry has brought unprecedented efficiency and connectivity, but it has also exposed critical infrastructure to a new generation of cyber threats. Operational Technology (OT) – the hardware and software controlling physical processes in sectors like energy, manufacturing, healthcare and transportation – is increasingly interconnected with traditional IT networks and the wider internet, dramatically expanding the attack surface for malicious actors.
Protecting these environments is no longer just about securing network perimeters or understanding specific industrial protocols. It now involves managing complex, interconnected ecosystems encompassing IT, OT and the Internet of Things (IoT). This demands more sophisticated, integrated security platforms capable of providing unified visibility, context-aware threat detection and comprehensive risk management across previously siloed domains.
This week, Cyber Magazine highlights the Top 10 OT Security Companies helping drive these solutions.
10. Microsoft
HQ: Redmond, Washington, USA
CEO: Satya Nadella
Microsoft addresses OT security through Microsoft Defender for IoT. Forrester categorised the company as a Contender in this sector. Defender for IoT provides asset discovery, vulnerability management, and threat detection for OT and enterprise IoT devices using behavioural analytics. The solution integrates with Microsoft's security ecosystem, including Sentinel for SIEM/SOAR capabilities and Defender XDR, enabling unified security operations. Microsoft promotes Zero Trust principles for OT networks, using Defender for IoT to support verification, least-privilege access and breach assumption strategies.
9. Honeywell
HQ: Charlotte, North Carolina, USA
CEO: Vimal Kapur
Honeywell applies its industrial expertise to OT cybersecurity through the Honeywell Forge portfolio. Forrester identified the company as a Strong Performer in this market. The vendor-neutral offerings focus on OT risk identification, prioritisation, and reduction. Products include Forge Cybersecurity+ | Cyber Insights and Cyber Watch for visibility and risk management, complemented by managed security services for monitoring and incident response. Specialised tools like Honeywell SMX address specific needs such as secure USB usage. The company emphasises operational resilience and business continuity across industrial environments.
8. Siemens
HQ: Munich, Germany
CEO: Roland Busch
Global industrial powerhouse Siemens incorporates cybersecurity within its automation and digitalisation offerings. The company provides OT security solutions and services designed for industrial lifecycle management. The portfolio includes cybersecurity assessments based on industry frameworks, asset and vulnerability reporting, and managed patch management services that maintain system integrity without operational disruption. Siemens Advanta consulting provides guidance for OT cybersecurity maturity improvement, working to reconcile IT and OT security requirements.
7. Tenable
HQ: Columbia, Maryland, USA
Co-CEOs: Steve Vintz & Mark Thurmond
Tenable, a well-established leader in vulnerability management, has expanded from vulnerability management into OT security with Tenable OT Security. Forrester designated the company a Strong Performer in this category. The solution employs a patented approach for asset discovery across IT/OT environments. Features include risk-based vulnerability management using Tenable's Vulnerability Priority Rating, threat detection, configuration monitoring, and compliance reporting for industry standards. The platform aims to bridge communication between IT and OT security teams through unified visibility and risk metrics.
6. Nozomi Networks
HQ: San Francisco, California, USA
CEO: Edgard Capdevielle
Nozomi Networks is another prominent specialist focusing on OT and IoT security, recognised as a Leader in Gartner's 2025 CPS Protection Platforms Magic Quadrant and a Strong Performer by Forrester. The platform provides asset discovery, network visualisation, vulnerability assessment, risk monitoring, and threat detection, with deployment options spanning on-premise, cloud, and hybrid models. The company has secured investment from industrial firms including Mitsubishi Electric and Schneider Electric, indicating potential for integration within industrial systems.
5. Dragos
HQ: Hanover, Maryland, USA
CEO: Robert M. Lee
Founded by OT security practitioners, Dragos is a highly regarded specialist vendor dedicated to safeguarding the world's critical infrastructure. The Dragos Platform delivers OT asset visibility, threat detection and vulnerability management, enhanced by the company's threat intelligence research. Its vulnerability prioritisation methodology helps security teams focus on critical risks. Beyond technology, Dragos provides incident response, security assessments and managed threat hunting services. The company has attracted venture funding that reflects market confidence in its approach.
4. Fortinet
HQ: Sunnyvale, California, USA
CEO: Ken Xie
Under CEO Ken Xie, Fortinet has extended its Security Fabric framework to address operational technology requirements. Fortinet's approach centres on ruggedised versions of its FortiGate next-generation firewalls, switches, and access points built for industrial conditions. The platform includes OT threat intelligence, remote access controls (FortiPAM), deception technology (FortiDeceptor), endpoint protection (FortiEDR) and security analytics (FortiSIEM, FortiAnalyzer). The company maintains an integration ecosystem with partners to accommodate various OT needs.
3. Claroty
HQ: New York, New York, USA
CEO: Yaniv Vardi
Claroty focuses on securing Cyber-Physical Systems across industrial, healthcare and commercial settings. Gartner positioned the company as a Leader in the 2025 CPS Protection Platforms Magic Quadrant for both execution capability and strategic vision. The Claroty Platform, available as cloud-based xDome or on-premise CTD, provides asset visibility, exposure management, network protection, access controls, and threat detection. The company has secured funding rounds resulting in a reported valuation exceeding $2.5 billion.
2. Cisco Systems
HQ: San Jose, California, USA
CEO: Chuck Robbins
Networking giant Cisco maintains a substantial presence in OT security with its Industrial Threat Defense solution. The offering builds upon Cisco's networking foundation by embedding security functions into industrial hardware designed for harsh environments. The solution incorporates Cyber Vision for asset visibility, Secure Firewall for segmentation, and Identity Services Engine for policy enforcement. Cisco's acquisition of Splunk enhances its security information and event management capabilities, enabling unified monitoring across IT, OT, and cloud environments to detect and respond to threats.
1. Palo Alto Networks
HQ: Santa Clara, California, USA
CEO: Nikesh Arora
Palo Alto Networks has positioned itself as a force in OT security by leveraging its enterprise cybersecurity foundation. Forrester recognised the firm as a Leader in its 2024 OT Security Wave, noting its end-to-end platform approach to securing industrial environments. The company designs its strategy around the integration of OT security controls within its broader security platform, which enables organisations to maintain visibility across converging environments.
Palo Alto Networks has developed specific protections for OT infrastructure connected via 5G networks. The platform incorporates threat prevention services that recognise OT-specific protocols and vulnerabilities, enabling security teams to detect attempted exploits without interfering with production systems.
The firm serves multiple industrial verticals including manufacturing facilities, energy providers, transportation networks and healthcare institutions.
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