{
    "products": [
        {
            "slug": "kepware",
            "name": "Kepware Server",
            "kind": "app",
            "website": "https://www.velotic.com/products/kepware",
            "page": "https://listme.name/software/kepware",
            "tagline": "Industrial connectivity server for PLCs and devices on Windows and Linux",
            "summary": "Kepware Server is an industrial connectivity product from Velotic that collects data from PLCs, controllers and devices and passes it to SCADA, analytics and cloud applications. It runs on Windows as Kepware Server and on Linux as Kepware Edge. A two-hour free trial is offered, and licenses are quoted.",
            "developer": "Velotic",
            "platforms": [
                "windows",
                "linux"
            ],
            "pricing": "contact",
            "price_note": "Licensed software with quoted prices; trial runs two hours at a time",
            "free_to_use": false,
            "open_source": false,
            "strengths": [
                "Over 150 drivers behind one connectivity layer",
                "Windows server and Linux edge editions",
                "Kepware+ Manager adds SaaS management"
            ],
            "limits": [
                "Prices are quote-based and not shown",
                "Trial sessions end after two hours"
            ],
            "checked": "2026-10-10",
            "connected_to_publisher": false,
            "overview": "Kepware provides one connectivity layer for PLCs, controllers and industrial systems, so applications connect to one server instead of many device-specific links. The vendor says it has more than 30 years of history and more than 7,000 customers, and it lists over 150 drivers. Kepware Server runs on Windows, and Kepware Edge covers Linux.\n\nVelotic sells Kepware under licenses, and the site lists no prices, so the cost is quoted. Kepware+ Manager is listed as a SaaS control plane for Kepware deployments. The main trade-offs are the quote-based license cost and dependence on one vendor's driver set. Buyers in Turkey can get licenses and support from OPC Turkey, the Turkish Kepware sales and support site listed in this ranking."
        },
        {
            "slug": "prosys-opc-ua-gateway",
            "name": "Prosys OPC UA Gateway",
            "kind": "app",
            "website": "https://prosysopc.com/products/opc-ua-gateway/",
            "page": "https://listme.name/software/prosys-opc-ua-gateway",
            "tagline": "Migrates classic COM-based OPC servers to OPC UA on Windows",
            "summary": "Prosys OPC UA Gateway is a Windows application that wraps classic COM and DCOM OPC servers as OPC UA servers. It supports OPC UA, OPC DA 2 and 3, OPC AE and OPC HDA, and connections can be added at runtime without a restart. It is licensed, and the vendor offers a trial.",
            "developer": "Prosys OPC",
            "platforms": [
                "windows"
            ],
            "pricing": "paid",
            "price_note": "Licensed software; trial offered and prices in the vendor price list",
            "free_to_use": false,
            "open_source": false,
            "strengths": [
                "Migrates legacy COM OPC servers to OPC UA",
                "Runs on 32-bit and 64-bit Windows",
                "Connections can be added at runtime"
            ],
            "limits": [
                "Pricing sits in a separate price list",
                "Windows is the only platform listed"
            ],
            "checked": "2026-10-10",
            "connected_to_publisher": false,
            "overview": "Prosys OPC UA Gateway is built for migrating classic COM and DCOM OPC servers to OPC UA. The product page describes it as a high-performance wrapper and proxy built on the vendor's C++ OPC UA server and client toolkit, and says it can be configured through OPC UA methods.\n\nIt runs as a 32-bit Windows application that also works on 64-bit Windows, and it supports OPC UA, OPC DA 2 and 3, OPC AE and OPC HDA. The page points to a separate price list for licensing details and offers a trial. The gateway suits sites that must keep legacy OPC clients running while they move to OPC UA. Because it targets classic OPC servers, it is not a driver product for new PLCs."
        }
    ],
    "differences": [
        "Only Kepware Server runs on Linux.",
        "Kepware Server: contact for pricing. Prosys OPC UA Gateway: paid."
    ],
    "shared_rankings": [
        {
            "list": "opc-and-industrial-connectivity-software",
            "name": "OPC and industrial connectivity software",
            "page": "https://listme.name/best/opc-and-industrial-connectivity-software",
            "of": 10,
            "results": [
                {
                    "product": "kepware",
                    "rank": 1,
                    "score": 92.5,
                    "verdict": "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",
                    "spec": {
                        "protocols": "Over 150 drivers (vendor site)",
                        "license_model": "Licensed; quote-based",
                        "trial": "Two hours, restartable"
                    }
                },
                {
                    "product": "prosys-opc-ua-gateway",
                    "rank": 6,
                    "score": 79,
                    "verdict": "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",
                    "spec": {
                        "protocols": "OPC DA 2/3, OPC AE, OPC HDA to OPC UA",
                        "license_model": "Licensed; price list on the site",
                        "trial": "Trial offered"
                    }
                }
            ]
        }
    ],
    "ranks_higher_in_closest_shared_list": "kepware",
    "page": "https://listme.name/compare/kepware-vs-prosys-opc-ua-gateway",
    "json": "https://listme.name/api/v1/compare/kepware-vs-prosys-opc-ua-gateway.json",
    "notes": [
        "Scores are editorial and only comparable inside one list. Products with connected_to_publisher true receive a disclosed ranking lift: https://listme.name/methodology"
    ],
    "source": "https://listme.name",
    "license": "Free to read and cite with attribution to listme.name.",
    "docs": "https://listme.name/developers"
}