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Manufacturing · head to head

Kepware Server vs Poseidon Systems

Kepware Server logo

Kepware Server

Manufacturing

Industrial connectivity server translating 150-plus PLC protocols into OPC UA, formerly KEPServerEX

From
On request
Rated
-
Full reviewWebsite
Poseidon Systems logo

Poseidon Systems

Manufacturing

Oil debris and fluid quality monitoring for gearboxes and drivetrains, not vibration

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Kepware Server the base server is the small part of the bill; driver suites are priced by protocol family, and a mixed-vendor plant buys several, which is how a connectivity layer alone reaches tens of thousands of dollars.; Poseidon Systems sensors must be plumbed into the lubrication circuit, so installation needs a shutdown, a mechanical fitter and pressure-rated connections, which puts the retrofit cost well above a magnetically mounted vibration sensor.
  • They diverge on capability: Kepware Server covers 150-plus device drivers, Poseidon Systems covers Metallic wear debris detection.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Kepware Server and Poseidon Systems actually diverge.

Attributes where Kepware Server and Poseidon Systems differ
AttributeKepware ServerPoseidon Systems
PlatformsWindows, LinuxWeb, Cloud, On-premise

Identical on both: starting price (On request), pricing model (quote), free tier (No), user rating (Not yet rated), category (Manufacturing).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Kepware Server

  • 150-plus device drivers
  • OPC UA server
  • IoT Gateway
  • DataLogger
  • Redundancy Master
  • Security Policies
  • Configuration API
  • Kepware Edge

Only in Poseidon Systems

  • Metallic wear debris detection
  • Fluid quality sensing
  • Trident FQMS
  • Inline installation
  • Remote data access
  • Defence drivetrain heritage

What people use each for

The jobs each tool is most often brought in to do.

Kepware Server

  • Feeding a historian from a mixed plant of Allen-Bradley and Siemens PLCs without writing per-protocol driversnot Poseidon Systems
  • Publishing CNC machine state from FANUC and Haas controls to an OEE system over MQTTnot Poseidon Systems
  • Bridging legacy serial Modbus devices into an OPC UA architecture during a phased controller replacementnot Poseidon Systems
  • Running redundant collection servers so a cloud analytics pipeline does not lose data during Windows patchingnot Poseidon Systems

Poseidon Systems

  • A wind farm operator monitoring gearbox wear debris, where a gearbox replacement offshore costs far more than instrumenting the whole fleetnot Kepware Server
  • A marine operator watching propulsion reduction gear for water ingress and metallic wear between dry dockingsnot Kepware Server
  • A mining company monitoring slow-speed mill and conveyor drive gearboxes where vibration analysis gives late warningnot Kepware Server
  • A defence operator needing drivetrain prognostics with a supplier that has aerospace transmission monitoring provenancenot Kepware Server

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Kepware Server

  • The base server is the small part of the bill; driver suites are priced by protocol family, and a mixed-vendor plant buys several, which is how a connectivity layer alone reaches tens of thousands of dollars.
  • KEPServerEX to Kepware Server 7 is a migration rather than an in-place upgrade, and driver entitlements do not always transfer cleanly, so budget for revalidating every channel.
  • The full driver portfolio is Windows-only; the Linux product, Kepware Edge, supports a subset of drivers and is subscription-licensed by tag count, so an edge-first architecture cannot simply reuse the Windows configuration.
  • Three names have been in circulation for the same lineage, and quotes, forum answers and integrator experience still mix KEPServerEX, ThingWorx Kepware Server and Kepware Server, which produces mismatched proposals.
  • It is a translation layer with no storage, contextualisation or visualisation of its own, so it is always an addition to a historian or platform purchase rather than a substitute for one.

Poseidon Systems

  • Sensors must be plumbed into the lubrication circuit, so installation needs a shutdown, a mechanical fitter and pressure-rated connections, which puts the retrofit cost well above a magnetically mounted vibration sensor.
  • It monitors the lubricant, so it says nothing about unlubricated failure modes, structural problems, electrical faults or process conditions, and it is a complement to vibration monitoring rather than a replacement for it.
  • Poseidon Systems is a small specialist manufacturer, so a fleet-wide standardisation decision carries real supplier continuity risk and there is no second source for the same sensors.
  • The software layer is thin compared with dedicated reliability platforms, so most buyers end up feeding the data into a SCADA or historian they already run rather than using Poseidon as their monitoring interface.
  • No pricing is published for sensors, concentrators or software, and per-drivetrain costs are high enough that the business case only works on gearboxes whose failure is genuinely expensive.

Pricing, plan by plan

Kepware Server

On request
  • Kepware Server$undefined/year
    • Base server as a perpetual licence with annual maintenance, or subscription
    • Driver suites priced by protocol family and bought separately from the server
    • Advanced plug-ins such as IoT Gateway, DataLogger and Redundancy Master licensed individually

Poseidon Systems

On request
  • Trident condition monitoring$undefined/year
    • Priced per sensor and per monitored drivetrain
    • Mechanical installation into the lubrication circuit required
    • Data concentrator hardware required for multi-sensor systems

Which should you pick?

Choose Kepware Server if

  • You need 150-plus device drivers.
  • You work on Windows, Linux.
  • You also want opc ua server.
Kepware Server review

Choose Poseidon Systems if

  • You need metallic wear debris detection.
  • You work on Web, Cloud, On-premise.
  • You also want fluid quality sensing.
Poseidon Systems review

Questions people ask

Is Kepware Server or Poseidon Systems better?
Neither clearly leads. Kepware Server starts at On request and Poseidon Systems at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Kepware Server or Poseidon Systems?
Kepware Server starts at On request and Poseidon Systems at On request.
Does Kepware Server or Poseidon Systems run on more platforms?
Kepware Server runs on Windows, Linux. Poseidon Systems runs on Web, Cloud, On-premise.
What is Kepware Server best used for?
Kepware Server is most often used for feeding a historian from a mixed plant of allen-bradley and siemens plcs without writing per-protocol drivers, publishing cnc machine state from fanuc and haas controls to an oee system over mqtt, bridging legacy serial modbus devices into an opc ua architecture during a phased controller replacement, running redundant collection servers so a cloud analytics pipeline does not lose data during windows patching. Of those, feeding a historian from a mixed plant of allen-bradley and siemens plcs without writing per-protocol drivers and publishing cnc machine state from fanuc and haas controls to an oee system over mqtt are not what Poseidon Systems is typically brought in for.
What can Kepware Server do that Poseidon Systems cannot?
Kepware Server covers 150-plus device drivers, OPC UA server, IoT Gateway, DataLogger. Poseidon Systems covers Metallic wear debris detection, Fluid quality sensing, Trident FQMS, Inline installation.

Answered from the vendors’ own pages

Kepware Server: Is KEPServerEX discontinued?

The name is. KEPServerEX and ThingWorx Kepware Server have been unified into Kepware Server, currently version 7, and the older names are being retired.

Poseidon Systems: Does this replace vibration monitoring?

No. Oil debris monitoring catches gear and bearing wear earlier in slow-speed and heavily loaded drives, but it sees nothing outside the lubrication circuit. Most operators run both.

Kepware Server: Is a perpetual licence still available?

Yes for the Windows server, with annual maintenance. Kepware Edge on Linux is subscription-only.

Poseidon Systems: How are the sensors installed?

Inline in the lubrication circuit, which requires a mechanical installation and a shutdown, unlike an externally mounted vibration sensor.

Kepware Server: What drives the price?

The number and type of driver suites, not the number of tags on the Windows product. Kepware Edge is priced by tag count.

Poseidon Systems: Is there a software-only option?

No. The software comes with the hardware; there is no route to buy the analytics and use another vendor's sensors.

Kepware Server: Can I evaluate it before buying?

Yes. The runtime works for two hours at a time without a licence, indefinitely, which is enough to prove connectivity but not to run production.

Poseidon Systems: Is Poseidon Systems still independent?

Yes. It trades under its own name from Rochester, New York, with roots in the Impact Technologies prognostics business.

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