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CAD · head to head

PrusaSlicer vs SolveSpace

PrusaSlicer logo

PrusaSlicer

CAD

Feature-rich 3D printing slicer

From
Free
Rated
-
Full reviewWebsite
S

SolveSpace

CAD

Open source parametric CAD with a constraint solver in a few megabytes

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: PrusaSlicer limited to slicing workflow only; no interactive 3D design capabilities; SolveSpace the in-house geometry kernel fails on complex boolean operations and fillets, and the failure is sometimes silent bad geometry rather than an error message, so models must be checked before export or manufacture.
  • They diverge on capability: PrusaSlicer covers Automatic supports, SolveSpace covers Constraint solver.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which PrusaSlicer and SolveSpace actually diverge.

Attributes where PrusaSlicer and SolveSpace differ
AttributePrusaSlicerSolveSpace
Pricing modelfreeOpen source, no licence fee
Founded2012Unknown

Identical on both: starting price (Free), free tier (Yes), platforms (Windows, macOS, Linux), user rating (Not yet rated), category (CAD).

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 PrusaSlicer

  • Automatic supports
  • Multi-material
  • Variable layer height
  • Custom G-code
  • Paint-on supports
  • Ironing
  • Prusa printers
  • Most FDM printers

Only in SolveSpace

  • Constraint solver
  • Solid modelling
  • Assemblies
  • Export formats
  • Cross-platform
  • Small footprint

What people use each for

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

PrusaSlicer

  • Preparation of STL models for 3D printingnot SolveSpace
  • Multi-material printing preparationnot SolveSpace
  • G-code generation and customisation via macrosnot SolveSpace

SolveSpace

  • Designing 3D printed parts on a machine that cannot run mainstream CADnot PrusaSlicer
  • Teaching constraint-based parametric modelling without buying licences for a classroomnot PrusaSlicer
  • Checking that a mechanical linkage moves as intended before cutting metalnot PrusaSlicer
  • Producing dimensionally accurate STEP or STL output from a small open source toolchainnot PrusaSlicer

Where each one falls short

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

PrusaSlicer

  • Limited to slicing workflow only; no interactive 3D design capabilities
  • Designed for RepRap-based printers; compatibility with other printer architectures varies

SolveSpace

  • The in-house geometry kernel fails on complex boolean operations and fillets, and the failure is sometimes silent bad geometry rather than an error message, so models must be checked before export or manufacture.
  • There is no proper drawing and dimensioning workflow, so manufacturing documentation has to be produced in another application.
  • Development is volunteer-led and intermittent; long gaps between releases are normal and there is no support contract available at any price.
  • Assembly-level import of external CAD is very limited, so it does not fit a supply chain that exchanges native or assembly-level models with suppliers.
  • The interface follows its own conventions rather than mainstream CAD ones, so existing SolidWorks or Fusion users spend time unlearning habits for a tool with a lower ceiling.

Pricing, plan by plan

PrusaSlicer

Free

No published plan breakdown. See the PrusaSlicer review.

SolveSpace

Free
  • SolveSpaceFree
    • Full application under the GPL
    • No seat limit
    • Windows, macOS and Linux builds

Which should you pick?

Choose PrusaSlicer if

  • You need automatic supports.
  • You want to start without paying.
  • You work on Windows, macOS, Linux.
  • You also want multi-material.
PrusaSlicer review

Choose SolveSpace if

  • You need constraint solver.
  • You want to start without paying.
  • You work on Windows, macOS, Linux.
  • You also want solid modelling.
SolveSpace review

Questions people ask

Is PrusaSlicer or SolveSpace better?
Neither clearly leads. PrusaSlicer starts at Free and SolveSpace at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, PrusaSlicer or SolveSpace?
PrusaSlicer starts at Free and SolveSpace at Free.
Does PrusaSlicer or SolveSpace run on more platforms?
Both run on Windows, macOS, Linux, so platform support will not decide this one for you.
Can I use PrusaSlicer for free?
Both have a free tier, so you can try either at no cost before committing.
What is PrusaSlicer best used for?
PrusaSlicer is most often used for preparation of stl models for 3d printing, multi-material printing preparation, g-code generation and customisation via macros. Of those, preparation of stl models for 3d printing and multi-material printing preparation are not what SolveSpace is typically brought in for.
What can PrusaSlicer do that SolveSpace cannot?
PrusaSlicer covers Automatic supports, Multi-material, Variable layer height, Custom G-code. SolveSpace covers Constraint solver, Solid modelling, Assemblies, Export formats.

Answered from the vendors’ own pages

PrusaSlicer: How much does PrusaSlicer cost?

PrusaSlicer is completely free and open-source software developed by Prusa Research.

Source
SolveSpace: Is it really free for commercial work?

Yes. It is released under the GPL with no licence fee and no seat limit. Support is community only.

SolveSpace: Can it replace Fusion 360 or SolidWorks?

No. It handles parts and simple assemblies well. Complex geometry, drawings and supply chain interoperability are outside its range.

SolveSpace: What hardware does it need?

Very little. It runs on old laptops and small Linux machines where mainstream CAD will not start.

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