CAD · head to head
FreeCAD vs nTop
nTop
CAD
Implicit computational design for lattices, heat exchangers and topology-driven parts
- From
- On request
- Rated
- -
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; nTop nTop is a specialist tool that sits alongside mainstream CAD rather than replacing it, so you pay for an extra seat and accept a handoff between two geometry systems.
- They diverge on capability: FreeCAD covers Parametric modeling, nTop covers Implicit modelling.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which FreeCAD and nTop actually diverge.
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 nTop
- Implicit modelling
- Lattice and cellular structures
- Field-driven design
- Integrated simulation
- Reusable workflows
- Topology optimisation
- CAD and AM interoperability
What people use each for
The jobs each tool is most often brought in to do.
FreeCAD
- Mechanical engineering designnot nTop
- Architectural modellingnot nTop
- Product design and prototypingnot nTop
- CAM/CNC path generationnot nTop
nTop
- Designing a variable-density lattice bracket where mass must drop without losing stiffness in the loaded regionsnot FreeCAD
- Generating a heat exchanger with thousands of internal channels that a conventional CAD kernel cannot representnot FreeCAD
- Producing patient-specific implant geometry with porous surfaces at scale rather than one at a timenot FreeCAD
- Automating a family of parts as a reusable design workflow that reruns when the load case changesnot 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
nTop
- nTop is a specialist tool that sits alongside mainstream CAD rather than replacing it, so you pay for an extra seat and accept a handoff between two geometry systems.
- Implicit modelling requires a different way of thinking from feature-based CAD, and the retraining period is long enough that unused licences are a common and expensive outcome.
- No pricing is published and there is no free or hobbyist tier, so evaluation runs through a sales process and small teams cannot try it seriously without engaging.
- Subscription only, with no perpetual licence, means the geometry logic you built stops being editable the day you stop paying, which is a real risk for long-lifecycle aerospace and medical programmes.
- The output is most valuable when you have additive manufacturing capacity to make it; organisations without machines that can print the geometry end up designing parts nobody can produce.
Pricing, plan by plan
FreeCAD
FreeNo published plan breakdown. See the FreeCAD review.
nTop
On request- nTop$undefined/year
- Annual named or floating seat subscription
- No perpetual licence offered
- Capability tiers quoted by use case
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.
Choose nTop if
- You need implicit modelling.
- You work on Windows, Cloud.
- You also want lattice and cellular structures.
Questions people ask
- Is FreeCAD or nTop better?
- Neither clearly leads. FreeCAD starts at Free and nTop at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, FreeCAD or nTop?
- FreeCAD has a free tier; the other does not. Paid plans start at Free for FreeCAD and On request for nTop.
- Does FreeCAD or nTop run on more platforms?
- FreeCAD runs on Windows, macOS, Linux. nTop runs on Windows, Cloud.
- Can I use FreeCAD for free?
- Yes. FreeCAD has a free tier, so you can try it without paying. nTop 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 nTop is typically brought in for.
- What can FreeCAD do that nTop cannot?
- FreeCAD covers Parametric modeling, Part design, Assembly, Drafting. nTop covers Implicit modelling, Lattice and cellular structures, Field-driven design, Integrated simulation.
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.
SourcenTop: Is nTop the same company as nTopology?
Yes. nTopology rebranded to nTop. The product is the same lineage.
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.
SourcenTop: Does it replace SolidWorks or NX?
No. It is used alongside them. Mainstream CAD handles the conventional geometry and assembly; nTop handles the lattice, field-driven and complex internal structure work.
nTop: Is there a free version?
No free commercial tier is published. Access runs through a demo and sales process, with academic programmes handled separately.
nTop: Can I buy a perpetual licence?
No. It is sold as an annual subscription, so budget it as recurring cost across the life of the programme.
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