Is Prosys OPC UA Gateway better than open62541?

Prosys OPC UA Gateway ranks higher in our list of OPC and industrial connectivity software (#6 against #8, score 79.0 against 77.5), but the gap is small and the better choice depends on what you need. open62541 is best for: developers building OPC UA servers and clients in C. Prosys OPC UA Gateway is best for: migrating legacy COM OPC servers to OPC UA.

Which is cheaper, open62541 or Prosys OPC UA Gateway?

open62541: Free and open source. Prosys OPC UA Gateway: Licensed software; trial offered and prices in the vendor price list.

Do open62541 and Prosys OPC UA Gateway run on the same platforms?

open62541 supports Windows, Linux, Android. Prosys OPC UA Gateway supports Windows.

Comparison · OPC and industrial connectivity software

open62541 vs Prosys OPC UA Gateway: which is better in 2026?

open6254177.5#8 in best OPC and industrial connectivity software

Prosys OPC UA Gateway79.0#6 in best OPC and industrial connectivity software

Prosys OPC UA Gateway ranks higher in our list of OPC and industrial connectivity software (#6 against #8, score 79.0 against 77.5), but the gap is small and the better choice depends on what you need.

How we rank Share

77.5
Editorial score
79.0
3
Platforms
1
Yes
Free to use
No
Yes
Open source
No

Which should you choose?

Choose open62541 if you want

Developers building OPC UA servers and clients in C.

Free MPL-2.0 OPC UA library in C99 that runs on Windows, Linux, RTOS and Android. It suits developers who write their own servers and clients, and it is not a configurable gateway or a client tool.

Choose Prosys OPC UA Gateway if you want

Migrating legacy COM OPC servers to OPC UA.

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.

The main differences

Only open62541 runs on Linux.
Only open62541 runs on Android.
open62541 is open source; Prosys OPC UA Gateway is not.
open62541 can be used for free; Prosys OPC UA Gateway requires payment.

Side by side

	open62541	Prosys OPC UA Gateway
Score	77.5	79.0
Rank in list	#8 of 10	#6 of 10
Price	Free and open source	PaidLicensed software; trial offered and prices in the vendor price list
Free to use	Yes	No
Open source	Yes	No
Platforms	WindowsLinuxAndroidWindows, Linux, Android	WindowsWindows
Made by	Not stated	Prosys OPC
Protocols	OPC UA (IEC 62541)	OPC DA 2/3, OPC AE, OPC HDA to OPC UA
License model	Open source under MPL-2.0	Licensed; price list on the site
Trial	Not needed; source is free	Trial offered
Best for	Developers building OPC UA servers and clients in C	Migrating legacy COM OPC servers to OPC UA
Strengths	MPL-2.0 licensed, with the source public on GitHub Runs on Windows, Linux, RTOS and Android Written in C99 with minimal dependencies for embedded targets	Migrates legacy COM OPC servers to OPC UA Runs on 32-bit and 64-bit Windows Connections can be added at runtime
Limits	Needs C programming, since it is a library rather than a gateway	Pricing sits in a separate price list Windows is the only platform listed
Links	Visit site	Visit site

Questions about open62541 vs Prosys OPC UA Gateway

Is Prosys OPC UA Gateway better than open62541?: Prosys OPC UA Gateway ranks higher in our list of OPC and industrial connectivity software (#6 against #8, score 79.0 against 77.5), but the gap is small and the better choice depends on what you need. open62541 is best for: developers building OPC UA servers and clients in C. Prosys OPC UA Gateway is best for: migrating legacy COM OPC servers to OPC UA.
Which is cheaper, open62541 or Prosys OPC UA Gateway?: open62541: Free and open source. Prosys OPC UA Gateway: Licensed software; trial offered and prices in the vendor price list.
Do open62541 and Prosys OPC UA Gateway run on the same platforms?: open62541 supports Windows, Linux, Android. Prosys OPC UA Gateway supports Windows.