OpenMES

OpenMES is a web-based, open-source manufacturing execution system for small and mid-sized manufacturers bringing factory-floor work and office operations together. Its Community plan is a capable starting point for a single site; teams that need multi-site operations, advanced modules, or guaranteed support should consider Enterprise.

Overview

OpenMES brings production monitoring, scheduling, work orders, maintenance, analytics, quality control, and traceability into one system. Automatic OEE calculation and real-time dashboards give production teams a view of performance as work progresses. LOT and serial-number tracking, inline quality control with SPC charts, and audit trails support accountability through production. The free core covers substantial ground, but its single-site design draws a boundary around Community.

The core is described as AGPL-3.0, with modules under AFL-3.0; commercial licenses are available for certain use cases. Daily usage reporting is enabled by default, excludes entered production and personal data, and can be disabled in settings or with OPENMES_TELEMETRY=false. Documented access controls include role-based permissions and two-factor login.

Key features

Production planning and control

Drag-and-drop Gantt scheduling sits alongside work orders, maintenance, and real-time production monitoring. Automatic OEE calculation and analytics help connect schedules and shop-floor activity with operational performance. This breadth suits manufacturers looking to coordinate core execution work in one system, though advanced reports and workforce tools require Enterprise.

Traceability, quality, and connectivity

LOT and serial-number traceability, inline quality control with SPC charts, and audit trails make OpenMES relevant where production records and quality checks matter. OPC UA, MQTT, and Modbus connect IoT and SCADA equipment, while a REST API supports links to ERP, CMMS, LIMS, and other systems. Wapro Mag and Subiekt NEXO PRO integration modules are also listed.

Deployment and mobile access

OpenMES can be self-hosted. Enterprise deployments are offered on-premise or in the cloud, with Docker and Kubernetes options described. The repository documents installing the progressive web app on iOS and Android tablets, including offline work with automatic sync. A hosted subscription platform is being explored, with early access sign-ups invited; it is not presented as an established cloud offering.

Pricing

Community’s free price and broad core make it a practical way to cover execution needs at one site, but it gives up advanced reports, organizational structure, workforce tools, inspection workflows, advanced warehouse functions, and advanced BOM visualization. Enterprise adds those capabilities and a named support engineer with guaranteed SLA response times; its price is custom pricing. Community support instead relies on documentation, existing issues, and discussions.

Platforms

OpenMES supports web, Android, iOS, API, and self-hosted use. Tablet users can install its progressive web app and work offline with automatic synchronization. Self-hosting gives teams a deployment option beyond the developing hosted subscription platform.

Who it's for

OpenMES is a strong fit for small and mid-sized manufacturers that want production visibility, work order coordination, quality controls, and traceability without a Community subscription fee. It is less suited to organizations that need multi-site scope, advanced enterprise workflows, or guaranteed support unless they are prepared to move to Enterprise. Teams seeking a ready hosted subscription should also weigh that the cloud version is still being explored.

Pros and cons

• Pro: Community combines monitoring, OEE, scheduling, work orders, maintenance, quality, and traceability at no cost, giving single-site manufacturers a wide execution toolkit without a paid entry plan.
• Pro: OPC UA, MQTT, Modbus, and a REST API provide routes to connect equipment and business systems.
• Pro: Self-hosting, offline tablet work with automatic sync, and documented role-based access control and two-factor login support operational flexibility.
• Con: Community is designed for single-site operations; organizations needing enterprise workflows must step up to custom-priced Enterprise.
• Con: Community support is community-based rather than guaranteed SLA support, which comes with Enterprise.
• Con: The hosted subscription platform is still being explored, so teams looking for an established hosted option may need another product.

Alternatives

Manufacturing Execution Systems

• MES AI is another free, open-source MES framework; consider it if its Linux, macOS, or Windows platform support better fits your environment.
• Leading2Lean Smart Manufacturing Platform is a paid option with Android, iOS, macOS, web, and Windows support; contact L2L for a consultation on pricing.
• ABB Manufacturing Execution System is a paid option spanning Android, API, iOS, web, and Windows, with pricing and purchase information by inquiry.
• GE Vernova Proficy Plant Applications offers a hosted or on-premises mix for process, discrete, and mixed manufacturing; choose it if those manufacturing modes and deployment mix are a closer fit.
• NETVIBES is a paid option with a free plan and free trial; consider it if those terms or its listed portfolio roles are relevant to your needs.
• FactoryLogix is a paid, self-hosted option; pricing is not published, and a demo can be requested.
• Plex MES offers one low annual subscription fee with unlimited users and machines, no overage charges, and no data-transfer limit; consider it if predictable scale without user or machine caps matters.
• Aptean Industrial Manufacturing ERP Traverse Edition is a paid option with a free trial and pricing provided on request.

Verdict

Choose OpenMES if you are a small or mid-sized manufacturer seeking a broad, free MES core for a single site, with self-hosting and equipment connectivity options. Its main advantage is the range of production, quality, and traceability capabilities in Community; its main reason to look elsewhere is the single-site boundary and the custom-priced Enterprise step for advanced workflows and guaranteed support.