Voltrus is a lightweight SCADA platform shipped as a single Rust binary — no Java, Docker, or database server. Built-in drivers for Modbus TCP, MQTT, OPC-UA, Siemens S7, Allen-Bradley, DNP3, and BACnet/IP. Features web dashboards, alarm management, OEE tracking, automation engine, OT asset inventory, RBAC, and SSO. Runs on Raspberry Pi under 25MB RAM. One-time license from $249, no recurring fees.