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Best open62541 alternatives in 2026

open62541 is open-source C library that implements the OPC UA standard. These 9 alternatives come from the same rankings, ordered by editorial score. Connected products carry a small, disclosed lift.

9 alternatives From best OPC and industrial connectivity software How we rank Share

Ranked alternatives

  1. Kepware Server

    The broadest driver set in this list and one connectivity layer for PLCs, controllers and devices, on Windows and Linux. Licenses are quoted and the trial lasts two hours at a time.

    Best for Multi-vendor plants needing one driver layer

    WindowsLinuxContact for pricing

    92.5of 100
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  2. dataFEED OPC Suite

    Covers an OPC UA server, an OPC Classic gateway and MQTT or REST output, with store and forward in the Extended edition. It runs on Windows only, and each license is tied to its version.

    Best for OPC Classic to OPC UA gateway with cloud output

    WindowsContact for pricing

    88.5of 100
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  3. Cogent DataHub

    Gateways and tunnellers for OPC, Modbus and MQTT with built-in scripting, on Windows Server. The annual subscription has a 24-month minimum term, which suits long projects more than pilots.

    Best for Windows OPC and Modbus gateways on subscription

    WindowsSubscription

    85.0of 100
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  4. HighByte Intelligence Hub

    Also runs on macOS. Edge DataOps software that models OPC UA, Modbus and Sparkplug MQTT data and sends it to IT and cloud systems, on Windows, macOS, Linux or Docker. It is an annual subscription with a free 30-day trial license.

    Best for Edge data modeling for a Unified Namespace

    WindowsmacOSLinuxSubscription

    83.5of 100
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  5. Prosys OPC UA Gateway

    Wraps classic COM OPC DA, AE and HDA servers as OPC UA servers, with runtime connection changes. It is a 32-bit and 64-bit Windows application, and pricing sits in a separate price list.

    Best for Migrating legacy COM OPC servers to OPC UA

    WindowsPaid

    79.0of 100
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  6. UaGateway

    Wraps classic COM DA servers as OPC UA, with a secure tunneler and a store and forward archive, and it runs only on Windows. Features are unlocked by license keys, and the page lists no prices.

    Best for Migrating COM DA servers to OPC UA on Windows

    WindowsPaid

    78.5of 100
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  7. OPC Turkey*

    Also runs on Web. Turkish sales and support site for Kepware products, with licensing, downloads and a support form. It is a service channel rather than a product of its own, and it lists no prices.

    Best for Kepware licenses and support in Turkey

    WebContact for pricing

    73.5of 100
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  8. Telegraf

    Also runs on macOS. Open-source MIT agent with OPC UA and Modbus input plugins, built for Windows, macOS and Linux. It collects metrics into time-series and messaging outputs rather than acting as an OPC server or gateway.

    Best for Open-source OPC UA and Modbus data collection

    WindowsmacOSLinuxFree and open sourceOpen source

    72.0of 100
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  9. UaExpert

    A free OPC UA reference client for browsing, reading, writing and subscribing, on Windows and Linux. It is a testing tool rather than connectivity software, and plugins need keys above set limits.

    Best for Testing and commissioning OPC UA servers

    WindowsLinuxFree

    70.0of 100
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open62541 alternatives for macOS

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About open62541 alternatives

What is the best alternative to open62541?
On listme.name the highest-scored alternative is Kepware Server, followed by dataFEED OPC Suite. The right choice depends on price, platform and whether you need open source.
Is there a free alternative to open62541?
Yes. Free options include Telegraf, UaExpert.

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Made by, or connected to, the publisher of this site or people the publisher works with. Listed on the same criteria as everything else, with the lift described in How we rank and Disclosure.