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Manufacturing · head to head

Formlabs PreForm vs Kepware Server

Formlabs PreForm logo

Formlabs PreForm

Manufacturing

Free print preparation software that only drives Formlabs printers, because the money is in hardware and resin

From
Free
Rated
-
Full reviewWebsite
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

The short version

  • Only Formlabs PreForm has a free tier, so it costs nothing to try first.
  • Each has a real cost: Formlabs PreForm preForm only drives Formlabs printers, so the free software is really an entry cost to a closed hardware and resin ecosystem rather than a tool you can keep if you change machines.; 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.
  • They diverge on capability: Formlabs PreForm covers Automatic orientation, Kepware Server covers 150-plus device drivers.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Formlabs PreForm and Kepware Server actually diverge.

Attributes where Formlabs PreForm and Kepware Server differ
AttributeFormlabs PreFormKepware Server
Starting priceFreeOn request
Pricing modelFree with a Formlabs printerquote
Free tierYesNo
PlatformsWindows, macOSWindows, Linux

Identical on both: 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 Formlabs PreForm

  • Automatic orientation
  • Support generation
  • One-click print
  • Material presets
  • Dashboard
  • Fleet Control

Only in Kepware Server

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

What people use each for

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

Formlabs PreForm

  • A dental laboratory preparing surgical guides on a validated resin and printer combinationnot Kepware Server
  • A prototyping team running several Form printers that needs job queueing and usage trackingnot Kepware Server
  • A jewellery workshop laying out castable patterns to maximise parts per buildnot Kepware Server
  • An education lab that needs software with no per-student licence costnot Kepware Server

Kepware Server

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

Where each one falls short

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

Formlabs PreForm

  • PreForm only drives Formlabs printers, so the free software is really an entry cost to a closed hardware and resin ecosystem rather than a tool you can keep if you change machines.
  • Formlabs resin is sold in proprietary cartridges, and the ongoing consumable cost over a printer's life dwarfs anything a paid slicer would have charged.
  • Third-party resins can be used only through open material settings that step outside validated profiles, which affects print reliability and the comfort of warranty support.
  • Parameter-level control is deliberately limited compared with open slicers, so advanced users cannot tune exposure and layer behaviour the way they can on an open platform.
  • It is Windows and macOS only with no Linux build, which is awkward for research groups and labs standardised on Linux workstations.

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.

Pricing, plan by plan

Formlabs PreForm

Free
  • PreFormFree
    • Free download with no licence fee or subscription
    • No installation or seat limit
    • Works only with Formlabs printers

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

Which should you pick?

Choose Formlabs PreForm if

  • You need automatic orientation.
  • You want to start without paying.
  • You work on Windows, macOS.
  • You also want support generation.
Formlabs PreForm review

Choose Kepware Server if

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

Questions people ask

Is Formlabs PreForm or Kepware Server better?
Neither clearly leads. Formlabs PreForm starts at Free and Kepware Server at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Formlabs PreForm or Kepware Server?
Formlabs PreForm has a free tier; the other does not. Paid plans start at Free for Formlabs PreForm and On request for Kepware Server.
Does Formlabs PreForm or Kepware Server run on more platforms?
Formlabs PreForm runs on Windows, macOS. Kepware Server runs on Windows, Linux.
Can I use Formlabs PreForm for free?
Yes. Formlabs PreForm has a free tier, so you can try it without paying. Kepware Server starts at On request.
What is Formlabs PreForm best used for?
Formlabs PreForm is most often used for a dental laboratory preparing surgical guides on a validated resin and printer combination, a prototyping team running several form printers that needs job queueing and usage tracking, a jewellery workshop laying out castable patterns to maximise parts per build, an education lab that needs software with no per-student licence cost. Of those, a dental laboratory preparing surgical guides on a validated resin and printer combination and a prototyping team running several form printers that needs job queueing and usage tracking are not what Kepware Server is typically brought in for.
What can Formlabs PreForm do that Kepware Server cannot?
Formlabs PreForm covers Automatic orientation, Support generation, One-click print, Material presets. Kepware Server covers 150-plus device drivers, OPC UA server, IoT Gateway, DataLogger.

Answered from the vendors’ own pages

Formlabs PreForm: Is PreForm free?

Yes, with no licence fee, subscription or installation limit. It is free because it only prepares jobs for Formlabs printers.

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.

Formlabs PreForm: Can PreForm drive a non-Formlabs printer?

No, and it never will. It is the front end for Formlabs hardware, which is where the revenue is.

Kepware Server: Is a perpetual licence still available?

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

Formlabs PreForm: Can I use third-party resin?

Only via open material settings, which take you outside validated profiles and the reliability those profiles are tuned for.

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.

Formlabs PreForm: Does it run on Linux?

No. Builds are provided for Windows and macOS only.

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.

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