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CAD · head to head

SolveSpace vs Ultimaker Cura

S

SolveSpace

CAD

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

From
Free
Rated
-
Full reviewWebsite
Ultimaker Cura logo

Ultimaker Cura

CAD

Powerful 3D printing slicer

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: 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.; Ultimaker Cura support varies by community contribution
  • They diverge on capability: SolveSpace covers Constraint solver, Ultimaker Cura covers Universal printer support.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which SolveSpace and Ultimaker Cura actually diverge.

Attributes where SolveSpace and Ultimaker Cura differ
AttributeSolveSpaceUltimaker Cura
Pricing modelOpen source, no licence feeUnknown
FoundedUnknown2011

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 SolveSpace

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

Only in Ultimaker Cura

  • Universal printer support
  • Custom profiles
  • Plugin marketplace
  • Cloud integration
  • Tree supports
  • Arachne engine
  • Ultimaker printers
  • Most FDM printers

What people use each for

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

SolveSpace

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

Ultimaker Cura

  • 3D print slicingnot SolveSpace
  • Professional printingnot SolveSpace

Where each one falls short

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

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.

Ultimaker Cura

  • Support varies by community contribution
  • No commercial technical support

Pricing, plan by plan

SolveSpace

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

Ultimaker Cura

Free

No published plan breakdown. See the Ultimaker Cura review.

Which should you pick?

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

Choose Ultimaker Cura if

  • You need universal printer support.
  • You want to start without paying.
  • You work on Windows, macOS, Linux.
  • You also want custom profiles.
Ultimaker Cura review

Questions people ask

Is SolveSpace or Ultimaker Cura better?
Neither clearly leads. SolveSpace starts at Free and Ultimaker Cura at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, SolveSpace or Ultimaker Cura?
SolveSpace starts at Free and Ultimaker Cura at Free.
Does SolveSpace or Ultimaker Cura run on more platforms?
Both run on Windows, macOS, Linux, so platform support will not decide this one for you.
Can I use SolveSpace for free?
Both have a free tier, so you can try either at no cost before committing.
What is SolveSpace best used for?
SolveSpace is most often used for designing 3d printed parts on a machine that cannot run mainstream cad, teaching constraint-based parametric modelling without buying licences for a classroom, checking that a mechanical linkage moves as intended before cutting metal, producing dimensionally accurate step or stl output from a small open source toolchain. Of those, designing 3d printed parts on a machine that cannot run mainstream cad and teaching constraint-based parametric modelling without buying licences for a classroom are not what Ultimaker Cura is typically brought in for.
What can SolveSpace do that Ultimaker Cura cannot?
SolveSpace covers Constraint solver, Solid modelling, Assemblies, Export formats. Ultimaker Cura covers Universal printer support, Custom profiles, Plugin marketplace, Cloud integration.

Answered from the vendors’ own pages

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.

Ultimaker Cura: Is Ultimaker Cura free?

Yes. Ultimaker Cura is completely free and open-source under the LGPL license. There are no premium versions, subscriptions, or hidden fees. All features are available to everyone.

Source
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.

Ultimaker Cura: How many printers does Cura support?

Ultimaker Cura supports over 400 different 3D printer models with out-of-the-box configuration. Users can add custom printers and profiles.

Source
SolveSpace: What hardware does it need?

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

Ultimaker Cura: What file formats does Cura import?

Ultimaker Cura converts STL, OBJ, 3MF, and other 3D file formats into G-code instructions that 3D printers can execute.

Source
Ultimaker Cura: What features are available?

Cura offers 400+ configurable print settings, material profiles, intent profiles for specific applications, plugin support via the Ultimaker Marketplace, and active community development on GitHub.

Source
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