Industrial OPC UA, productised.
Sterfive turns the open-source OPC UA stack we author and maintain into ready-to-deploy commercial products. Edge servers, Global Discovery, modelling tools — supported by the engineers who wrote the stack.
Our Products
Six commercial products, one OPC UA platform
From a single configurable edge server to a fleet-wide Global Discovery Server — every product built on, and consistent with, the open-source stack we maintain.
OPC UA Omni-Edge
Bridge every brownfield device to OPC UA — S7, Modbus, EtherNet/IP, IO-Link, and more — with a single YAML file.
OPC UA GDS
A Part-12 Global Discovery Server that automates the entire X.509 certificate lifecycle across your industrial fleet.
OPC UA Modeler
Build OPC UA information models the way you write code — low-code YAML in VS Code, NodeSet2.xml on demand.
OPC UA Aggregator
Aggregate hundreds of OPC UA servers into a single unified address space, accessible from one client connection.
OPC UA for Node-RED
Production-grade OPC UA for Node-RED — drag, connect, deploy, with secure sessions and high-throughput subscriptions.
OPC UA Toolbox
A complete set of diagnostic and operational tools for OPC UA networks — for engineers, integrators and operators.
Product Spotlight
See our products in action
A live walk-through of five Sterfive products — auto-rotating, hover to pause.
Featured · OPCUA for Node-RED
Supercharge 
with native 
power.
OPCUA for Node-RED bridges industrial devices and modern flows in minutes. Drag, connect, deploy — production‑grade OPC UA made visual, scriptable & fast.
- Secure sessions & certificates
- High‑throughput subscriptions
- Drag‑and‑drop flow nodes
- Handle OPC UA JSON 1.05
[{
"id": "a1",
"type": "opcua-client",
"endpoint": "opc.tcp://plc1:4840",
"actions": [{ "read": "ns=2;s=Tank1.Level" }, { "subscribe": "ns=2;s=Line1.Speed" }]
}, {
"id": "b2",
"type": "function",
"name": "Alert",
"code": "if (msg.payload.Level > 80) node.warn('High level');"
}]Read, subscribe & write OPC UA variables inside visual flows. Add logic, dashboards & cloud connectors — in minutes.
Featured · OPC UA Omni-Edge
Bridge every brownfield device with one YAML file.
S7, Modbus, EtherNet/IP, EtherCAT, IO-Link, OPC UA, Redis — all exposed as a single standards-compliant OPC UA endpoint. No code, no compilation, no per-protocol gateway sprawl.
- One YAML, zero code
- Native S7 · Modbus · IO-Link · EtherCAT
- OPC Foundation companion specs included
- JSONata transformations, hot reload
port: 4840
nodesets:
- di
- machinery
instances:
- browseName: Press42
organizedBy: /di:DeviceSet
typeDefinition: a:HydraulicPressType
brownfieldDevices:
s7:
- { name: plc1, address: 192.168.1.10, rack: 0, slot: 1 }
modbus:
- { name: mb1, type: TCP, address: 192.168.1.20, port: 502 }
mapping:
- opcua: /di:DeviceSet/Press42/a:Temperature
type: s7
point: plc1/DB10.DBD0:REAL
jsonata: value * 0.1 + 273.15
Validated in your IDE. Hot-reloaded with --watch.
Featured · OPC UA GDS
The OPC UA Global Discovery Server, productised.
Automate the entire X.509 certificate lifecycle across your industrial fleet — issuance, renewal, revocation, trust list distribution. PULL and PUSH on the same instance, pluggable CA backend, Docker in 60 seconds.
- OPC UA Part 12 conformant
- PULL & PUSH on the same instance
- Built-in · Step-CA · Vault · ADCS · EJBCA
- Docker-native, persistent PKI volume
services:
sterfive-gds:
image: sterfive/gds-server:latest
ports:
- "4840:4840" # OPC UA endpoint
- "8443:8443" # Admin HTTPS UI
volumes:
- gds-data:/data/gds
environment:
GDS_CA_BACKEND: builtin
GDS_CERT_VALIDITY_DAYS: 90
GDS_SERVER_CERT_MODE: ca-signed
restart: unless-stopped
volumes:
gds-data:
Pluggable CA. Persistent volume. Production-ready in five minutes.
Featured · OPC UA Modeler
OPC UA information models, written like code.
A low-code YAML DSL inside Visual Studio Code. Design, validate and export standards-compliant NodeSet2.xml in minutes — with live IntelliSense, hover docs, and validation as you type.
- Low-code YAML DSL in VS Code
- Live validation, modelling-rule checks
- NodeSet2.xml generation on demand
- Companion specs as first-class citizens
namespaces:
- uri: http://acme.com/UA/Press/
alias: a
types:
- browseName: a:HydraulicPressType
subtypeOf: di:DeviceType
components:
- browseName: a:Temperature
nodeClass: Variable
dataType: Double
modelling: Mandatory
- browseName: a:Pressure
nodeClass: Variable
dataType: Double
modelling: Mandatory
- browseName: a:Status
nodeClass: Variable
dataType: String
modelling: Optional
IntelliSense, validation, hover docs — directly in VS Code.
Featured · OPC UA Aggregator
Hundreds of servers, one address space.
The NodeOPCUA Aggregator connects to hundreds of OPC UA servers simultaneously and merges them into a single unified tree — so your SCADA, historian or cloud client only ever opens one session.
- Fan-in hundreds of OPC UA servers
- Single secure endpoint downstream
- Namespace remapping & filtering
- Supported by the node-opcua team
Multiple OPC UA servers, merged into a single address space — accessible from one client session.
Why Sterfive
Buy from the team that authors the OPC UA stack underneath.
"We've maintained
node-opcuasince 2014. Over a decade, we've seen exactly where teams hit OPC UA walls — and we've spent that decade productising the answers. Omni-Edge for brownfield bridging, GDS for certificate management at fleet scale, Modeler for information models. One vendor, one accountable contact, no dependency chain — and the engineers who wrote the underlying standard answer your support tickets."
Etienne Rossignon — Creator of NodeOPCUA & CEO of Sterfive
Why buy from Sterfive
Four reasons no other OPC UA vendor can claim — and that compound across every product and service we ship.
Authors of node-opcua
We don't just use node-opcua — we wrote it, and we've maintained it since 2014. The engineers who built the open-source OPC UA stack are the same ones who answer your support tickets.
Productised, not just open-source
Six ready-to-deploy commercial products built on the same stack we maintain upstream. Configuration-driven, Docker-native, regulatory-aligned — and supported as products, not side projects.
OPC Foundation Member
Officially aligned with the standard. Our engineers participate in working groups and the conformance test process. Compliance is how we build, not how we market.
Services and support included
Consulting, training and commercial support — backed by direct access to the node-opcua maintainers. One contact for the SDK, the products, and the standard underneath.
Ready to talk?
One vendor for OPC UA — products, services, and the people who wrote the stack.
Request a quote, ask for an evaluation licence, or just tell us what you're trying to build. Direct maintainer access is included with every paid tier — a benefit unique to buying from the team that authors the underlying OPC UA stack.