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CAD · head to head

FreeCAD vs MoI (Moment of Inspiration)

FreeCAD logo

FreeCAD

CAD

Open-source parametric 3D CAD modeler

From
Free
Rated
-
Full reviewWebsite
MoI (Moment of Inspiration) logo

MoI (Moment of Inspiration)

CAD

NURBS modeller bought once, built for designers rather than engineers

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only FreeCAD has a free tier, so it costs nothing to try first.
  • Each has a real cost: FreeCAD no pricing published; product is completely free and open-source; MoI (Moment of Inspiration) it is developed by one person, so releases are years apart and there is no support organisation to escalate to when something blocks your work.
  • They diverge on capability: FreeCAD covers Parametric modeling, MoI (Moment of Inspiration) covers Direct NURBS modelling.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which FreeCAD and MoI (Moment of Inspiration) actually diverge.

Attributes where FreeCAD and MoI (Moment of Inspiration) differ
AttributeFreeCADMoI (Moment of Inspiration)
Starting priceFreeOn request
Pricing modelopen-sourceOne-time purchase
Free tierYesNo
PlatformsWindows, macOS, LinuxWindows, macOS
Founded2002Unknown

Identical on both: 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 FreeCAD

  • Parametric modeling
  • Part design
  • Assembly
  • Drafting
  • FEM simulation
  • Path/CAM
  • Architecture
  • BIM

Only in MoI (Moment of Inspiration)

  • Direct NURBS modelling
  • Clean mesh export
  • Pen-oriented interface
  • Boolean toolset
  • STEP and IGES exchange
  • Scriptable commands

What people use each for

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

FreeCAD

  • Mechanical engineering designnot MoI (Moment of Inspiration)
  • Architectural modellingnot MoI (Moment of Inspiration)
  • Product design and prototypingnot MoI (Moment of Inspiration)
  • CAM/CNC path generationnot MoI (Moment of Inspiration)

MoI (Moment of Inspiration)

  • Converting CAD surfaces into clean quad meshes for a polygon or sculpting applicationnot FreeCAD
  • Modelling hard-surface concept designs where form matters and engineering documentation does notnot FreeCAD
  • Working on older or low-specification hardware that will not run mainstream CADnot FreeCAD
  • Buying a modelling tool outright rather than committing to a recurring CAD subscriptionnot FreeCAD

Where each one falls short

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

FreeCAD

  • No pricing published; product is completely free and open-source
  • Donations are optional and voluntary for project support

MoI (Moment of Inspiration)

  • It is developed by one person, so releases are years apart and there is no support organisation to escalate to when something blocks your work.
  • There is no parametric history and no assembly structure, so a late design change means remodelling rather than editing a feature.
  • It produces no dimensioned drawings or manufacturing documentation, so anything heading for production needs a second package for the paperwork.
  • Exchange is limited to surface formats such as STEP and IGES with no native interoperability with mainstream MCAD systems, so it sits at the edge of an engineering pipeline rather than inside it.
  • Each major version is a fresh purchase, and the long gaps between versions mean a fix or a feature you need can be several years away with no interim release.

Pricing, plan by plan

FreeCAD

Free

No published plan breakdown. See the FreeCAD review.

MoI (Moment of Inspiration)

On request
  • MoI$undefined/year
    • Perpetual licence for one major version
    • Windows and macOS
    • Paid upgrade for each subsequent major version

Which should you pick?

Choose FreeCAD if

  • You need parametric modeling.
  • You want to start without paying.
  • You work on Windows, macOS, Linux.
  • You also want part design.
FreeCAD review

Choose MoI (Moment of Inspiration) if

  • You need direct nurbs modelling.
  • You work on Windows, macOS.
  • You also want clean mesh export.
MoI (Moment of Inspiration) review

Questions people ask

Is FreeCAD or MoI (Moment of Inspiration) better?
Neither clearly leads. FreeCAD starts at Free and MoI (Moment of Inspiration) at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, FreeCAD or MoI (Moment of Inspiration)?
FreeCAD has a free tier; the other does not. Paid plans start at Free for FreeCAD and On request for MoI (Moment of Inspiration).
Does FreeCAD or MoI (Moment of Inspiration) run on more platforms?
FreeCAD runs on Windows, macOS, Linux. MoI (Moment of Inspiration) runs on Windows, macOS.
Can I use FreeCAD for free?
Yes. FreeCAD has a free tier, so you can try it without paying. MoI (Moment of Inspiration) starts at On request.
What is FreeCAD best used for?
FreeCAD is most often used for mechanical engineering design, architectural modelling, product design and prototyping, cam/cnc path generation. Of those, mechanical engineering design and architectural modelling are not what MoI (Moment of Inspiration) is typically brought in for.
What can FreeCAD do that MoI (Moment of Inspiration) cannot?
FreeCAD covers Parametric modeling, Part design, Assembly, Drafting. MoI (Moment of Inspiration) covers Direct NURBS modelling, Clean mesh export, Pen-oriented interface, Boolean toolset.

Answered from the vendors’ own pages

FreeCAD: How much does FreeCAD cost?

FreeCAD is completely free with no licensing fees, vendor lock-in, sign-up requirements, paywalls, or restrictions. The software is open-source and available for anyone to use and adapt.

Source
MoI (Moment of Inspiration): Is it a subscription?

No. It is bought outright per major version, and each new major version is a separate paid upgrade.

FreeCAD: Does FreeCAD offer optional support or sponsorship?

FreeCAD accepts voluntary donations to support the project. Sponsorship tiers range from $1 per month (Normal Sponsor) to $200 per month (Gold Sponsor), with different visibility levels. One-time donations of any amount are also accepted.

Source
MoI (Moment of Inspiration): Can it replace Rhino?

For direct form modelling, often yes. For anything needing Grasshopper, drawings, plugins or engineering interoperability, no.

MoI (Moment of Inspiration): Why do 3D artists use it alongside other tools?

Its NURBS to polygon conversion produces cleaner meshes than most CAD exporters, which saves retopology work downstream.

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