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Manufacturing · head to head

Kepware Server vs PTC Windchill

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
PTC Windchill logo

PTC Windchill

Manufacturing

Enterprise PLM for regulated hardware, priced entirely by negotiation

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.; PTC Windchill no pricing is published at any tier, and per-user rates are heavily negotiable on multi-year commitments, so the first quote a buyer receives is rarely the achievable price and small buyers without volume have little leverage.
  • They diverge on capability: Kepware Server covers 150-plus device drivers, PTC Windchill covers Part and BOM management.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Kepware Server and PTC Windchill actually diverge.

Attributes where Kepware Server and PTC Windchill differ
AttributeKepware ServerPTC Windchill
PlatformsWindows, LinuxWeb, Windows, On-premise, Cloud, API

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 PTC Windchill

  • Part and BOM management
  • Change and configuration management
  • CAD data management
  • Variant and options management
  • Quality management
  • Windchill Navigate
  • Service information

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 PTC Windchill
  • Publishing CNC machine state from FANUC and Haas controls to an OEE system over MQTTnot PTC Windchill
  • Bridging legacy serial Modbus devices into an OPC UA architecture during a phased controller replacementnot PTC Windchill
  • Running redundant collection servers so a cloud analytics pipeline does not lose data during Windows patchingnot PTC Windchill

PTC Windchill

  • A medical device manufacturer needing a design history file and audit-ready change control for FDA and MDR submissionsnot Kepware Server
  • An aerospace supplier reconciling engineering and plant-specific manufacturing BOMs across multiple factoriesnot Kepware Server
  • An industrial equipment firm managing configurable product families where every unit shipped has a different option setnot Kepware Server
  • A company standardising on Creo that wants CAD data management and PLM from one vendor rather than twonot 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.

PTC Windchill

  • No pricing is published at any tier, and per-user rates are heavily negotiable on multi-year commitments, so the first quote a buyer receives is rarely the achievable price and small buyers without volume have little leverage.
  • Implementation dominates cost: data migration, configuration and training routinely account for the majority of three-year total cost of ownership, and large programmes run into seven figures of services.
  • Annual support and maintenance is charged as a percentage of licence value in the low-to-mid teens, so the bill continues indefinitely even in years when nothing is upgraded.
  • Upgrades between major releases are projects rather than updates, particularly where the deployment has been customised, and heavily customised sites often sit several versions behind.
  • The role-based licence tiers mean occasional participants such as purchasing or quality still consume paid seats unless you deploy Windchill Navigate, which is a further product to buy and configure.

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

PTC Windchill

On request
  • Windchill$undefined/year
    • Role-based seat tiers: Viewer, Contributor, Editor, Administrator
    • Modules for quality, variants, service and supplier collaboration priced separately
    • On-premise, customer cloud or PTC-hosted SaaS

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 PTC Windchill if

  • You need part and bom management.
  • You work on Web, Windows, On-premise, Cloud, API.
  • You also want change and configuration management.
PTC Windchill review

Questions people ask

Is Kepware Server or PTC Windchill better?
Neither clearly leads. Kepware Server starts at On request and PTC Windchill at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Kepware Server or PTC Windchill?
Kepware Server starts at On request and PTC Windchill at On request.
Does Kepware Server or PTC Windchill run on more platforms?
Kepware Server runs on Windows, Linux. PTC Windchill runs on Web, Windows, On-premise, Cloud, API.
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 PTC Windchill is typically brought in for.
What can Kepware Server do that PTC Windchill cannot?
Kepware Server covers 150-plus device drivers, OPC UA server, IoT Gateway, DataLogger. PTC Windchill covers Part and BOM management, Change and configuration management, CAD data management, Variant and options management.

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.

PTC Windchill: Is a perpetual licence still available?

PTC has moved decisively to subscription and now positions Windchill as a subscription product. Existing perpetual estates are supported but new perpetual sales are not the default route and should not be assumed.

Kepware Server: Is a perpetual licence still available?

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

PTC Windchill: How much does Windchill cost?

PTC publishes nothing. Expect role-tiered per-user subscription plus modules, plus support at a percentage of licence value, plus implementation services that usually exceed the software.

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.

PTC Windchill: Does it require Creo?

No. Creo integration is deepest, but connectors exist for SolidWorks, NX, CATIA and Inventor. Mixed-CAD sites are common.

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.

PTC Windchill: Is it overkill for a hundred-person hardware company?

Usually yes, unless you are in a regulated sector. Below that scale a cloud-native PLM will reach useful state in weeks rather than quarters.

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