Modern, Lightweight Linux & Docker Alternative to Kepware, Node-RED & Coreflux

Why pay thousands in recurring licensing fees for Windows Server overhead or deal with Node-RED garbage collection pauses? opcua2mqtt runs natively on Linux and Docker with sub-50MB RAM and perpetual ownership.

Comparison at a Glance (opcua2mqtt vs Kepware vs Node-RED vs Coreflux)

• OS Requirement: Pure Linux / Docker / Container native (no Windows Server required).
• Memory Footprint: <50MB RAM vs 1.2GB+ for legacy Windows OPC gateways and 400MB+ for Node-RED V8 runtimes.
• Air-Gapped & Offline Security: 100% offline Ed25519 license validation and embedded SQLite WAL store-and-forward buffer.
• Pricing: €490 perpetual license (up to 500 tags) with 1-year maintenance vs recurring high-cost subscriptions.