OpenMES review
A broad open-source MES for teams that need production, quality, traceability, and connectivity.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
OpenMES is a web-based, open-source manufacturing execution system for small, mid-sized, and larger manufacturers. It brings together work-order lifecycle tracking, visual scheduling, shop-floor execution, quality checks, lot and serial traceability, reporting, inventory, and machine connectivity. The product is a fit for manufacturers seeking a broad MES scope with self-hosted deployment and an open-source licensing model, particularly when production data needs to connect with existing ERP, SCADA, PLC, or IoT environments.
Its ecosystem fit is a central strength. OpenMES supports REST APIs and industrial protocols including MQTT, Modbus, and OPC UA, with integrations spanning ERP systems, SCADA, PLCs, IoT sensors, Wapro Mag, and Subiekt NEXO PRO. Shop-floor screens cover batch execution, counts, downtime, and issues, while real-time monitoring and OEE reporting provide operational visibility. Warehouse, inventory, barcode, and RFID management extend the system beyond production scheduling into material handling and traceability.
The platform also offers meaningful breadth for an open-source MES: quality control includes defect tracking, inspections, and SPC; traceability covers lots, batches, and serial numbers; and ERP data exchange links factory activity with business systems. Community users can self-host under the AGPL-3.0 license. An enterprise offering adds advanced modules, implementation services, dedicated support, and cloud or on-premise deployment options, including hybrid arrangements. OpenMES suits teams that value control, industrial connectivity, and a wide operational feature set. Organizations wanting a narrowly focused production tool, or a managed online experience immediately, should consider alternatives.
OpenMES pros and cons
- Where it wins
- Covers work orders, scheduling, OEE, quality, and traceability
- Connects with MQTT, Modbus, OPC UA, REST APIs, ERP, and SCADA
- Supports self-hosted deployment under the AGPL-3.0 license
- Where it doesn't
- Self-hosting may require internal technical ownership
- Enterprise modules and services are separate from the community edition
- OpenMES Online is described as coming soon
OpenMES fact sheet, pricing and score →
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update