Comparison · Scan to plan and scan to BIM
Neurones 3D vs Undet
Looking for a Undet alternative? Neurones 3D is free, offline point cloud and Gaussian splatting software for Windows: the free viewer runs every process, from AI classification to dimensioned floor plans, and a one-time paid edition saves the results.
Undet is a family of point cloud plug-ins for AutoCAD, Revit, SketchUp and ARES Commander, with a free stand-alone viewer, Undet Browser, for turning scans into 2D drawings and 3D or BIM models.
By Dr. Florent Poux, maker of Neurones 3D · Undet's facts from Undet's own documentation, checked
The short answer
Choose Neurones 3D when you want one offline program, bought once, that classifies the scan with trained models, draws a dimensioned floor plan automatically, measures change with M3C2 and builds terrain and contours, without paying for a CAD host as well. Choose Undet when your deliverable is a Revit, AutoCAD or SketchUp model and your team already has those licences: its tools live inside the program you model in, and a monthly term suits short projects.
At a glance
| Neurones 3D | Undet | |
|---|---|---|
| Runs on | Windows 10 and 11 (64-bit) | Windows, inside AutoCAD, Revit, SketchUp Pro or ARES Commander |
| Where it runs | desktop | plugin |
| Licence | free viewer + one-time paid editions | auto-renewing monthly, annual or 3-year subscription per host application |
| Price | Free viewer; paid editions bought once, no subscription | Undet for AutoCAD: EUR 139 a month (sale, from EUR 199), EUR 1,200 a year or EUR 2,500 for 3 years. Undet for SketchUp: EUR 59 a month (sale), EUR 500 a year or EUR 1,200 for 3 years, excluding VAT. Undet for Revit: not stated on the pages read source |
| Free use | The free viewer opens, views and runs every process; writing results out needs a paid edition | Free trial; Undet Browser is a free stand-alone viewer |
Feature by feature
"Not stated" means we could not find it in Undet's documentation, not that it is missing. Each of Undet's cells links to where we read it.
| Capability | Neurones 3D | Undet |
|---|---|---|
| Runs fully offline | YesNo account, no internet connection, no telemetry | Not stated |
| One-time licence available | YesBought once; no subscription | NoOnly auto-renewing 1-month, annual and 3-year licences are listed source |
| Opens LAS/LAZ and E57 | YesLAS, LAZ, COPC, E57, PLY, PCD and more; a 127.8 M point E57 opens in about 22 s | YesE57, LAS, LAZ, FLS, RCP/RCS, PTX, ZFS, PTS, PLY and more source |
| Scan registration | PartlyCloud-to-cloud alignment (ICP and graph matching, no initial placement needed), RMS shown with the inlier share | Not stated |
| AI point cloud classification | YesFour trained models ship in every build: indoor, aerial LiDAR, powerline, streetscape; a confidence per point | Not statedClass management and reclassification tools are documented; automatic AI classification is not |
| Segmentation | YesUnsupervised segmentation, primitive decomposition, components, rooms | PartlyAutomatic extraction of planes, boxes and pipes source |
| Automatic floor plans | YesAutomatic, dimensioned, with sections and elevations | PartlyAuto multi-line tool for fast 2D linework extraction from slices source |
| DXF / CAD drawings | YesDXF R2000, SVG and PDF; no DWG | YesWorks inside AutoCAD, Revit, SketchUp and ARES Commander, so drawings are native to the host source |
| DTM / DSM | YesDTM, DSM, CHM, slope, aspect, hillshade on one grid | YesTerrain mesh and DTM generation source |
| Contour lines | YesContours that cannot cross | Not stated |
| Change detection | YesM3C2 with a 95 % level of detection; cloud-to-cloud and cloud-to-BIM deviation | PartlyModel inspection colouring and Pano QC compare a model against the scan source |
| Meshing | YesPoisson and clean meshing; the clean mesh is closed, not edge-manifold | PartlyTerrain meshing that extracts the ground surface source |
| Gaussian splats | YesOpens PLY and SPZ splats, converts them to points, meshes them; does not train splats | Not stated |
| Reports | YesSelf-contained HTML reports with provenance | Not stated |
| Scripting / SDK | YesEngine & SDK edition: Python package and headless command line | Not stated |
Where Neurones 3D is stronger
- Neurones 3D is bought once, with no subscription; Undet lists only auto-renewing monthly, annual and 3-year licences.
- Neurones 3D is a stand-alone program and needs no AutoCAD, Revit or SketchUp licence underneath it.
- Four trained AI classification models ship with Neurones 3D, with a confidence per point.
- Automatic, dimensioned floor plans with sections and elevations, written to DXF, SVG and PDF.
- M3C2 change detection with a 95 % level of detection, where Undet documents model-against-scan colouring; contour lines are not listed by Undet.
Where Undet is stronger
- You model directly inside AutoCAD, Revit, SketchUp or ARES Commander, with the host’s own tools and file formats.
- Revit-specific scan-to-BIM helpers such as family creation from in-place models and Pano QC against scan photos.
- Wide native scanner format support, including FLS, RCP/RCS, ZFS and SLAM trajectories.
Who should choose which
Choose Neurones 3D to take a point cloud or a splat capture to a finished deliverable on your own machine: classified LAS, a dimensioned floor plan with sections and elevations in DXF, a DTM with contours, a change map or a report, without an account, an upload or a subscription. Every figure it publishes is measured; see the benchmarks.
Choose Undet: Drafters and modellers who already work in AutoCAD, Revit or SketchUp and want point cloud tools inside the CAD program they know.
Questions
Is Undet free?
Undet: Undet for AutoCAD: EUR 139 a month (sale, from EUR 199), EUR 1,200 a year or EUR 2,500 for 3 years. Undet for SketchUp: EUR 59 a month (sale), EUR 500 a year or EUR 1,200 for 3 years, excluding VAT. Undet for Revit: not stated on the pages read. Free use: Free trial; Undet Browser is a free stand-alone viewer. Neurones 3D’s free viewer opens, views and runs every process; writing results out needs a paid edition bought once.
Can Undet make a floor plan from a point cloud?
Undet: partly. Auto multi-line tool for fast 2D linework extraction from slices. Neurones 3D: yes. Automatic, dimensioned, with sections and elevations.
What is the best alternative to Undet?
Choose Neurones 3D when you want one offline program, bought once, that classifies the scan with trained models, draws a dimensioned floor plan automatically, measures change with M3C2 and builds terrain and contours, without paying for a CAD host as well. Choose Undet when your deliverable is a Revit, AutoCAD or SketchUp model and your team already has those licences: its tools live inside the program you model in, and a monthly term suits short projects.
How this comparison was made
Written by the maker of Neurones 3D, so read it as such. Undet's column comes only from Undet's published documentation and listings, read on 2026-09-24; where we found nothing, the cell says "not stated". Neurones 3D's column comes from its own guides, which give the limits too. If something here is wrong or out of date, write to howto@learngeodata.eu and it will be corrected.
Sources: