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Who is Cylus?
Cylus is a private cybersecurity company focused on protecting rail and mass transit environments by monitoring operational technology, signaling, and communications networks for cyber risk.
- Rail and transit cybersecurity monitoring for OT and ICS environments
- Asset discovery and visibility across signaling, onboard, wayside, and communications systems
- Threat detection and anomaly identification for railway networks and connected infrastructure
- Risk assessment, vulnerability management, and security posture support for transportation operators
- Support for compliance and security operations in safety-critical rail environments
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More About Cylus
Cylus operates as a company that provides cybersecurity software and related services for railway and metro operators, infrastructure managers, and other transportation organizations that run safety-critical operational environments. Its offerings are used to give security teams and engineering teams visibility into rail networks that include signaling, control, onboard, and wayside systems, along with the communications links that connect them. In enterprise settings, this places the company at the intersection of industrial cybersecurity and transportation technology.
The technology domain associated with Cylus is OT and ICS security, with a focus on rail-specific environments rather than general enterprise IT estates. Typical deployments in this category involve passive monitoring, network traffic analysis, asset identification, baseline behavior modeling, and alerting for suspicious or unauthorized activity. In rail environments, these functions can apply to systems tied to train control, signaling, SCADA-related components, communications networks, maintenance systems, and other operational assets that have long life cycles and mixed legacy and modern protocols.
Compared with broad industrial cybersecurity platforms, Cylus is positioned around the rail sector and its operating constraints, including availability requirements, segmented infrastructure, and the coexistence of information technology and operational technology. That sector focus matters because railway organizations often need security controls that fit around existing operational processes and safety requirements rather than conventional IT security tooling alone.
For customers, the business and technical value of this type of offering is tied to earlier detection of cyber events, better inventory of connected assets, and more structured assessment of exposure across rail operations. The company fits within current enterprise solution areas such as OT and industrial cybersecurity, threat detection, exposure and risk management, and security monitoring for transportation infrastructure. In practical terms, Cylus is best understood as a company supplying rail-focused cyber defense capabilities for operational networks and connected transport systems.
Our description of Cylus. Updated September 2026.
