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ANSYS Fluent vs FreeCAD

ANSYS Fluent logo

ANSYS Fluent

CAD

Computational fluid dynamics solver for turbulence, combustion and multiphase flow

From
On request
Rated
-
Full reviewWebsite
FreeCAD logo

FreeCAD

CAD

Open-source parametric 3D CAD modeler

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only FreeCAD has a free tier, so it costs nothing to try first.
  • Each has a real cost: ANSYS Fluent solver seats and HPC packs are licensed separately, and the packs scale by core count, so the cost of running a large case in parallel can exceed the base licence several times over and is the line item that surprises first-time buyers.; FreeCAD no pricing published; product is completely free and open-source
  • They diverge on capability: ANSYS Fluent covers Turbulence model library, FreeCAD covers Parametric modeling.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which ANSYS Fluent and FreeCAD actually diverge.

Attributes where ANSYS Fluent and FreeCAD differ
AttributeANSYS FluentFreeCAD
Starting priceOn requestFree
Pricing modelquoteopen-source
Free tierNoYes
PlatformsWindows, LinuxWindows, macOS, Linux
FoundedUnknown2002

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 ANSYS Fluent

  • Turbulence model library
  • Combustion and reacting flow
  • Multiphase flow
  • Meshing
  • HPC parallel solving
  • Fluent aero and native GPU solver
  • Ansys Workbench integration
  • User-defined functions

Only in FreeCAD

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

What people use each for

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

ANSYS Fluent

  • Certifying an aerospace component where the customer specification names a validated commercial CFD solvernot FreeCAD
  • Predicting thermal performance of a data centre or electronics enclosure before committing to a mechanical designnot FreeCAD
  • Combustion analysis for a gas turbine or industrial burner where detailed chemistry models are requirednot FreeCAD
  • A consultancy that must hand a client an auditable analysis in a tool the client's own engineers can reopennot FreeCAD

FreeCAD

  • Mechanical engineering designnot ANSYS Fluent
  • Architectural modellingnot ANSYS Fluent
  • Product design and prototypingnot ANSYS Fluent
  • CAM/CNC path generationnot ANSYS Fluent

Where each one falls short

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

ANSYS Fluent

  • Solver seats and HPC packs are licensed separately, and the packs scale by core count, so the cost of running a large case in parallel can exceed the base licence several times over and is the line item that surprises first-time buyers.
  • Ansys does not publish any pricing, and quotes vary widely by region, industry and negotiating position, so a smaller firm has no way to know whether it is being charged fairly relative to a large account.
  • Synopsys completed its acquisition of Ansys in July 2025 and started shipping combined capabilities in 2026; packaging, bundling and account teams are changing, and buyers on multi-year agreements should expect renewal terms to be renegotiated on a different basis.
  • Getting trustworthy results demands genuine CFD expertise in meshing, turbulence model selection and convergence assessment, so the licence is useless without a specialist, and the specialist is harder to hire than the software is to buy.
  • Licences are typically served from a network licence manager, which means concurrent-use contention inside a busy simulation group; engineers queue for solver tokens, and organisations end up buying spare seats purely to avoid the queue.

FreeCAD

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

Pricing, plan by plan

ANSYS Fluent

On request
  • Ansys Fluent$undefined/year
    • Annual lease or paid-up perpetual licence
    • Solver seats licensed separately from HPC parallel packs
    • HPC packs priced by core count and scale multiplicatively

FreeCAD

Free

No published plan breakdown. See the FreeCAD review.

Which should you pick?

Choose ANSYS Fluent if

  • You need turbulence model library.
  • You work on Windows, Linux.
  • You also want combustion and reacting flow.
ANSYS Fluent review

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

Questions people ask

Is ANSYS Fluent or FreeCAD better?
Neither clearly leads. ANSYS Fluent starts at On request and FreeCAD at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, ANSYS Fluent or FreeCAD?
FreeCAD has a free tier; the other does not. Paid plans start at On request for ANSYS Fluent and Free for FreeCAD.
Does ANSYS Fluent or FreeCAD run on more platforms?
ANSYS Fluent runs on Windows, Linux. FreeCAD runs on Windows, macOS, Linux.
Can I use FreeCAD for free?
Yes. FreeCAD has a free tier, so you can try it without paying. ANSYS Fluent starts at On request.
What is ANSYS Fluent best used for?
ANSYS Fluent is most often used for certifying an aerospace component where the customer specification names a validated commercial cfd solver, predicting thermal performance of a data centre or electronics enclosure before committing to a mechanical design, combustion analysis for a gas turbine or industrial burner where detailed chemistry models are required, a consultancy that must hand a client an auditable analysis in a tool the client's own engineers can reopen. Of those, certifying an aerospace component where the customer specification names a validated commercial cfd solver and predicting thermal performance of a data centre or electronics enclosure before committing to a mechanical design are not what FreeCAD is typically brought in for.
What can ANSYS Fluent do that FreeCAD cannot?
ANSYS Fluent covers Turbulence model library, Combustion and reacting flow, Multiphase flow, Meshing. FreeCAD covers Parametric modeling, Part design, Assembly, Drafting.

Answered from the vendors’ own pages

ANSYS Fluent: How much does Fluent cost?

Ansys does not publish pricing. Expect an annual lease per solver seat plus separately licensed HPC packs for parallel cores, with the total for a serious capability running into six figures a year.

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
ANSYS Fluent: Is Fluent still an Ansys product?

Yes, but Ansys is now part of Synopsys following the acquisition that completed in July 2025, and the two portfolios are being combined.

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
ANSYS Fluent: Can OpenFOAM do the same job?

Numerically it can cover a lot of the same physics at no licence cost, but it lacks the meshing workflow, support and the validation pedigree that certification and customer specifications often require.

ANSYS Fluent: Is there a free version?

There is a student edition with cell count limits, suitable for learning but not for production work.

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