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CAD · head to head

OpenSCAD vs Simplify3D

OpenSCAD logo

OpenSCAD

CAD

The programmers solid 3D CAD modeler

From
Free
Rated
-
Full reviewWebsite
Simplify3D logo

Simplify3D

Manufacturing

Paid 3D printing slicer sold as a one-time licence in a market where rivals are free

From
$199/one-time
Rated
-
Full reviewWebsite

The short version

  • Only OpenSCAD has a free tier, so it costs nothing to try first.
  • Each has a real cost: OpenSCAD script-based workflow, not interactive design interface; Simplify3D every serious competitor is free, so the $199 has to be justified against Cura, PrusaSlicer, OrcaSlicer and Bambu Studio on support and consistency alone, not on capability.
  • They diverge on capability: OpenSCAD covers Script-based modeling, Simplify3D covers Process-based slicing.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which OpenSCAD and Simplify3D actually diverge.

Attributes where OpenSCAD and Simplify3D differ
AttributeOpenSCADSimplify3D
Starting priceFree$199/one-time
Pricing modelfreeOne-time purchase
Free tierYesNo
PlatformsWindows, macOS, Linux, WebAssemblyWindows, macOS, Linux
CategoryCADManufacturing
Founded2009Unknown

Identical on both: user rating (Not yet rated).

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 OpenSCAD

  • Script-based modeling
  • CSG operations
  • 2D to 3D extrusion
  • Parameterization
  • STL export
  • Preview
  • 3D printers
  • Slicers

Only in Simplify3D

  • Process-based slicing
  • Support generation
  • Layer preview
  • Floating licences
  • Offline licensing
  • Wide printer profiles

What people use each for

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

OpenSCAD

  • Parametric 3D design for manufacturing and 3D printingnot Simplify3D
  • Technical design with scripted control over geometrynot Simplify3D
  • Procedural model generationnot Simplify3D

Simplify3D

  • A print farm running machines from four manufacturers that wants one slicer and one set of profiles rather than fournot OpenSCAD
  • An engineering department on an air-gapped network that cannot use a slicer requiring online activationnot OpenSCAD
  • A team standardising support and infill settings across operators so prints are reproducible between shiftsnot OpenSCAD
  • A shop printing tall parts that need different settings at different heights in a single jobnot OpenSCAD

Where each one falls short

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

OpenSCAD

  • Script-based workflow, not interactive design interface
  • Limited to constructive solid geometry and 2D extrusion modelling
  • Not suitable for artistic 3D modelling or computer animation
  • Complex build dependencies (Qt, CGAL, Boost)

Simplify3D

  • Every serious competitor is free, so the $199 has to be justified against Cura, PrusaSlicer, OrcaSlicer and Bambu Studio on support and consistency alone, not on capability.
  • Major version upgrades are chargeable, so the perpetual licence covers a version rather than the product and the cost recurs every few years anyway.
  • Development cadence is slower than the open source slicers, and features such as newer tree support algorithms and multi-material handling appear there first.
  • Printer profiles for very new machines lag behind the manufacturer's own bundled slicer, so buyers of a brand new printer may get better results from the free tool that shipped with it.
  • Standard licences require an internet connection to activate, and the offline option is a separate purchase negotiated with sales rather than a checkbox at checkout.

Pricing, plan by plan

OpenSCAD

Free

No published plan breakdown. See the OpenSCAD review.

Simplify3D

$199/one-time
  • Standard licence$199/one-time
    • One user, perpetual for that version
    • Internet activation required
    • Two week money-back guarantee
  • Floating licence$undefined/one-time
    • Shared activation pool for teams
    • Priced on request
    • Volume discounts available
  • Offline licence$undefined/one-time
    • Activation without internet access
    • For secure or air-gapped networks
    • Priced on request

Which should you pick?

Choose OpenSCAD if

  • You need script-based modeling.
  • You want to start without paying.
  • You work on Windows, macOS, Linux, WebAssembly.
  • You also want csg operations.
OpenSCAD review

Choose Simplify3D if

  • You need process-based slicing.
  • You work on Windows, macOS, Linux.
  • You also want support generation.
Simplify3D review

Questions people ask

Is OpenSCAD or Simplify3D better?
Neither clearly leads. OpenSCAD starts at Free and Simplify3D at $199/one-time, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, OpenSCAD or Simplify3D?
OpenSCAD has a free tier; the other does not. Paid plans start at Free for OpenSCAD and $199/one-time for Simplify3D.
Does OpenSCAD or Simplify3D run on more platforms?
OpenSCAD runs on Windows, macOS, Linux, WebAssembly. Simplify3D runs on Windows, macOS, Linux.
Can I use OpenSCAD for free?
Yes. OpenSCAD has a free tier, so you can try it without paying. Simplify3D starts at $199/one-time.
What is OpenSCAD best used for?
OpenSCAD is most often used for parametric 3d design for manufacturing and 3d printing, technical design with scripted control over geometry, procedural model generation. Of those, parametric 3d design for manufacturing and 3d printing and technical design with scripted control over geometry are not what Simplify3D is typically brought in for.
What can OpenSCAD do that Simplify3D cannot?
OpenSCAD covers Script-based modeling, CSG operations, 2D to 3D extrusion, Parameterization. Simplify3D covers Process-based slicing, Support generation, Layer preview, Floating licences.

Answered from the vendors’ own pages

OpenSCAD: What is the cost of OpenSCAD?

OpenSCAD is free software with no licensing fees, subscriptions, or costs of any kind. The software is available as open-source with no restrictions on commercial or non-commercial use.

Source
Simplify3D: Is Simplify3D a subscription?

No. It is a one-time purchase of $199 per user, but upgrades to future major versions cost extra.

Simplify3D: Why pay when PrusaSlicer and Cura are free?

For a mixed fleet you get one interface and one profile library across brands, plus a supplier to call. If you run one printer from one vendor, the free slicer is usually the better choice.

Simplify3D: Can I install it on more than one computer?

A standard licence is per user with online activation. Teams needing shared or concurrent use buy floating licences, priced on request.

Simplify3D: Can I try it first?

There is a two week money-back guarantee rather than a free trial download.

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