Widely used in industry
Industrial automation vendors rely on open62541 for robust OPC UA connectivity in their products.
open62541
The open-source OPC UA implementation, backed by its maintainers for professional and industrial use.
Open source at industrial scale.
open62541 is an open-source implementation of OPC UA (IEC 62541) written in C. o6 Automation was started by its maintainers to support the library’s increased adoption in industry.
We oversee development and releases, provide official support and training, and employ many of the core contributors.
The right foundation for connected products.
Certified server profile
An open62541 example server has passed OPC Foundation certification for the Standard Server profile.
Automated quality assurance
Hundreds of tests run continuously, complemented by manual testing throughout the release process.
Large developer community
More than 320 developers from many organizations have contributed code and documentation.
Commercial-friendly license
The MPLv2 allows integration with commercial code; only modifications to the core library remain covered.
Professional support
Community support remains open, with commercial support available from the maintainers through o6 Automation.
One command to begin your journey.
On Debian or Ubuntu, install the maintained distribution package:
apt install libopen62541-1.4Battle-hardened package management makes it easier to receive current bug fixes and security improvements throughout your product lifecycle.
Need professional support for open62541?
Work directly with the maintainers for integration, long-term maintenance, CRA readiness, and training.