CAD · head to head
Arnold vs nTop
nTop
CAD
Implicit computational design for lattices, heat exchangers and topology-driven parts
- From
- On request
- Rated
- -
The short version
- Each has a real cost: Arnold the Internet Archive's capture of Autodesk's Arnold overview page on 30 December 2022 stated a subscription can be installed on up to 3 computers or devices, though only the named user may run it on one machine at a time, and includes access to the 3 previous major versions.; 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: Arnold covers Ray tracing, nTop covers Implicit modelling.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Arnold and nTop actually diverge.
Identical on both: free tier (No), 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 Arnold
- Ray tracing
- GPU rendering
- Production shading
- OSL
- Denoising
- Maya
- 3ds Max
- Cinema 4D
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.
Arnold
- Film productionnot nTop
- Animationnot nTop
- VFXnot nTop
nTop
- Designing a variable-density lattice bracket where mass must drop without losing stiffness in the loaded regionsnot Arnold
- Generating a heat exchanger with thousands of internal channels that a conventional CAD kernel cannot representnot Arnold
- Producing patient-specific implant geometry with porous surfaces at scale rather than one at a timenot Arnold
- Automating a family of parts as a reusable design workflow that reruns when the load case changesnot Arnold
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Arnold
- The Internet Archive's capture of Autodesk's Arnold overview page on 30 December 2022 stated a subscription can be installed on up to 3 computers or devices, though only the named user may run it on one machine at a time, and includes access to the 3 previous major versions.
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
Arnold
$29/month- Arnold$360/month
- Standalone renderer
nTop
On request- nTop$undefined/year
- Annual named or floating seat subscription
- No perpetual licence offered
- Capability tiers quoted by use case
Which should you pick?
Choose Arnold if
- You need ray tracing.
- You work on Windows, MacOS, Linux.
- You also want gpu rendering.
Choose nTop if
- You need implicit modelling.
- You work on Windows, Cloud.
- You also want lattice and cellular structures.
Questions people ask
- Is Arnold or nTop better?
- Neither clearly leads. Arnold starts at $29/month and nTop at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Arnold or nTop?
- Arnold starts at $29/month and nTop at On request.
- Does Arnold or nTop run on more platforms?
- Arnold runs on Windows, MacOS, Linux. nTop runs on Windows, Cloud.
- What is Arnold best used for?
- Arnold is most often used for film production, animation, vfx. Of those, film production and animation are not what nTop is typically brought in for.
- What can Arnold do that nTop cannot?
- Arnold covers Ray tracing, GPU rendering, Production shading, OSL. nTop covers Implicit modelling, Lattice and cellular structures, Field-driven design, Integrated simulation.
Answered from the vendors’ own pages
Arnold: How much does Autodesk Arnold cost?
Autodesk Arnold pricing is not published on the vendor website. Arnold is available through Autodesk subscription plans or standalone licensing. Customers should contact Autodesk directly for pricing quotes.
SourcenTop: Is nTop the same company as nTopology?
Yes. nTopology rebranded to nTop. The product is the same lineage.
Arnold: Is Arnold free for educational use?
Yes, Autodesk provides free educational licenses for Arnold to students and educators. Educational access allows learning of professional rendering capabilities at no cost.
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.
Arnold: What does Arnold render?
Autodesk Arnold is an industry-standard photorealistic rendering engine used for visual effects, animation, and design visualization. It supports GPU and CPU rendering with advanced features for film, television, and product design.
SourcenTop: 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.
Related pages
Other head to heads
- Arnold vs KeyShot
- Arnold vs LightWave 3D
- Arnold vs V-Ray
- Arnold vs FreeCAD
- Arnold vs Enscape
- Arnold vs Mari
- Arnold vs Houdini
- Arnold vs Redshift
- Arnold vs Octane Render
- Arnold vs PrusaSlicer
- Arnold vs MicroSurvey CAD
- Arnold vs MoI (Moment of Inspiration)
- Arnold vs Nomad Sculpt
- Arnold vs Corona Renderer
- Arnold vs Modo
- Arnold vs ANSYS Fluent
- Arnold vs Siemens NX
- Arnold vs CoreTechnologie
- Arnold vs COMSOL Multiphysics
- Arnold vs Bambu Studio
- Arnold vs SolveSpace
- Arnold vs Zoo
- Arnold vs OnShape
- Arnold vs Bentley iTwin Capture Modeler
- Arnold vs Alibre Design
- Arnold vs DraftSight
- Arnold vs IronCAD
- Arnold vs KiCad
- nTop vs KeyShot
- nTop vs LightWave 3D
- nTop vs V-Ray
- nTop vs FreeCAD
- nTop vs Enscape
- nTop vs Mari
- nTop vs Houdini
- nTop vs Redshift
- nTop vs Octane Render
- nTop vs PrusaSlicer
- nTop vs MicroSurvey CAD
- nTop vs MoI (Moment of Inspiration)
- nTop vs Nomad Sculpt
- nTop vs Corona Renderer
- nTop vs Modo
- nTop vs ANSYS Fluent
- nTop vs Siemens NX
- nTop vs CoreTechnologie
- nTop vs COMSOL Multiphysics
- nTop vs Bambu Studio
- nTop vs SolveSpace
- nTop vs Zoo
- nTop vs OnShape
- nTop vs Bentley iTwin Capture Modeler
- nTop vs Alibre Design
- nTop vs DraftSight
- nTop vs IronCAD
- nTop vs KiCad