Industrial OPC UA Middleware Core.
Engineered for Long-Term Industrial Integration.
OpenOpcUa is not a toolkit. It is a structured industrial middleware core built for stability, certification, and long-term lifecycle management.
A production-grade OPC UA middleware platform designed for certified industrial architectures, high availability, and long-term lifecycle stability.
What Is OpenOpcUa?
OpenOpcUa is an industrial OPC UA middleware core built for secure, high-performance, and long-term industrial deployment. OpenOpcUa is a robust, multi-platform OPC UA implementation designed to accelerate your industrial interoperability, data connectivity, and digital transformation. Originally launched in 2009 by a consortium led by industry experts, OpenOpcUa has become a proven foundation for industrial OPC UA applications worldwide.
OpenOpcUa is more than just software — it’s a trusted OPC UA technology platform that enables developers, integrators, and industrial organizations to build high-performance OPC UA clients and servers with confidence. Based on a professional, C/C++ codebase, it supports Windows, Linux, VxWorks and other target platforms.
Key Features:
Core Server
Industrial‑grade server engine designed for high performance and stability.
Client Library
Modern client stack with async reads, reconnection logic, and robust error handling.
VPI / VFI Ecosystem
Connect S7, Modbus, EIP, MQTT, OPC UA Client, archive to CSV, PostgreSQL, SQL Server.
Advanced OPC UA Features
Historical Access, Aggregates, HA, Redundancy, Secure Channels, Bulk Writes.
Industrial Middleware Architecture
OpenOpcUa is structured around a layered industrial middleware architecture:
- Certified OPC UA Core Engine,
- Advanced Information Modelling Layer,
- Secure Communication Stack (IEC 62541 compliant),
- High Availability & Redundancy Mechanisms,
- Industrial Integration Modules (S7, Modbus, MQTT, SQL, etc.)
This architecture ensures deterministic behavior, scalability, and long-term maintainability.
Why OPC UA Matters
OPC Unified Architecture (OPC UA, IEC 62541) is the de-facto industry standard for secure, platform-agnostic industrial communication. It enables safe and structured data exchange between machines, control systems, and enterprise applications — essential for Industry 4.0, IIoT, and smart manufacturing initiatives.
OPC UA combines secure communication, rich information modelling, and cross-platform interoperability, helping businesses unify OT and IT environments without vendor lock-in.
Built by Experts — Backed by Industry
OpenOpcUa is not a generic open-source stack — it is developed and maintained by industrial OPC UA architects involved in real-world certified deployments. OpenOpcUa is spearheaded by the team at 4CE Industry — a long-standing OPC Foundation member and recognized authority in OPC UA technologies. With over 25 years of experience, 4CE Industry delivers consulting, modelling, development and certification services to help organizations accelerate their OPC UA adoption and industrial data strategies.
Why Choose OpenOpcUa as Your OPC UA Middleware?
- Designed for long-term industrial lifecycle (10–20+ years),
- Built in professional C/C++ for deterministic performance,
- Structured engagement programs for industrial deployment,
- Suitable for certified and high-availability environments,
- Backed by real industrial expertise, not academic experimentation.
Use Cases
Whether you’re implementing OPC UA for:
- Data integration across heterogeneous systems
- IIoT and edge-to-cloud connectivity
- Standardized information modelling
- Legacy system modernization
- High-availability industrial communication
OpenOpcUa provides a flexible and extensible platform that scales with your business needs.
Get Involved
OpenOpcUa is supported by a global community of developers, integrators and industrial partners. Join the project, access documentation, and start building with a proven OPC UA technology stack.
Download Now →
Documentation →
Community & Support →
OpenOpcUa — The Industrial OPC UA Middleware Core for Secure and Sustainable Industrial Systems.
Partners
- 4CE INDUSTRY
- Become a partner