From the creators of node-opcua
Production-grade OPC UA, built for you β by the team that wrote the stack.
Custom servers, clients, gateways and product integrations. We turn your OPC UA requirements into reliable, deployable software β and support it for the long run.
Custom OPC UA development for your exact use case
OEMs & Machine Builders
Making your equipment OPC UA-native
Making your equipment OPC UA-native with embedded servers and clients.
Software & SaaS Vendors
Embedding OPC UA connectivity into your platform
Embedding OPC UA connectivity into your platform with the guidance of the node-opcua authors.
Operators & Integrators
Building custom connectors for your environment
Building custom connectors, gateways and data bridges for your specific environment.
From custom servers to full platform integrations
- Custom OPC UA servers & clients
Tailored to your devices, data model and performance targets. Built on node-opcua for maximum reliability.
- Protocol gateways & bridges
Connect S7, Modbus, MQTT, REST and legacy systems to OPC UA. Bidirectional, production-grade.
- Embed OPC UA in your product
Integrate node-opcua into your SaaS or platform fast, with the authors guiding the architecture.
- Companion spec implementation
Implement OPC Foundation companion specifications β Euromap, PackML, machine vision and more β to the letter.
- Edge & cloud connectors
Stream factory data to your historian or cloud platform reliably and securely.
- Modernization & migration
Move from OPC Classic or proprietary protocols to OPC UA without disrupting production.
Why Sterfive
The team behind the stack, at your service.
- Built on node-opcua, by the people who wrote it β no gap between your code and the stack.
- Production-proven in demanding industrial environments β 170K+ downloads/month.
- One team from spec to support: design, build, test on real hardware, maintain.
- Open-source roots, commercial reliability β speed without lock-in. See Consulting
From requirements to production, with full transparency
- Requirements workshop
We start by understanding your devices, your data model and your integration constraints β together.
- Fixed-scope proposal
A clear deliverable list, timeline and fixed price β no surprises.
- Agile development with regular demos
Short iterations with live demos so you see progress and steer the result.
- Testing against real PLCs & clients
We validate against your actual hardware and client tools before delivery.
- Handover + optional maintenance
Full documentation, knowledge transfer and optional long-term maintenance contract.
Flexible, transparent, no lock-in
- Fixed-price project
Defined scope, defined budget β ideal for well-specified deliverables.
- Dedicated team
A full Sterfive squad embedded in your project for extended engagements.
- Expert augmentation
Reinforce your in-house team with senior OPC UA engineers on demand.
Ready to build?
Have an OPC UA build in mind? Let's scope it.
Tell us about your project and we will get back to you with a concrete proposal β typically within a few business days.
Whether you need a full custom build or expert reinforcement for your team, we are ready to help you ship production-grade OPC UA software.