Cynalytica provides cybersecurity solutions for Industrial Control Systems (ICS) with a focus on monitoring serial communications at the deepest layers of operational technology networks. The company addresses a security gap in critical infrastructure by monitoring legacy serial-connected devices that operate at Levels 0 and 1 of the Purdue Model, between logic controllers and field devices. The company's flagship product, SerialGuard, enables passive and fail-safe capture of serial communications data from RS-232, RS-485, and RS-422 interfaces. Their OT OptICS platform is a managed service offering that provides machine learning-powered anomaly detection for serial communications, allowing organizations to monitor operational health and detect cyber threats without requiring extensive internal expertise. Cynalytica targets control system integrators and asset operators in critical infrastructure sectors including electrical power, water and wastewater treatment, oil and gas pipelines, and other industrial environments. The platform monitors unencrypted and unauthenticated serial protocols such as Modbus, Profibus, DNP3, IEC101, and BACnet MS/TP that remain prevalent in industrial environments. The company's approach combines operational health monitoring with cybersecurity capabilities, enabling detection of both operational anomalies and cyber threats like False Feedback attacks. The platform integrates with existing operational and security workflows while providing visibility into communications that traditional TCP/IP-focused security platforms cannot monitor.