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Free alternatives to Autodesk Fusion

Best free option: FreeCAD (Strong). Switching saves about $680 USD a year.

Autodesk Fusion, Autodesk Fusion, 1-year subscription

$680 USDa year

≈$969.48 CAD (converted from USD)

Every pick below has a free version.

Runs on
  • Windows
  • macOS
Key file formats
.f3d.step.stl.dxf

Filter alternatives

3 alternatives

Strong

2 tools

Covers most of the same work, with trade-offs noted on each card.

  1. Rank 1: FreeCAD

    Best for open-source parametric design

    License: Open source
    • Windows
    • macOS
    • Linux
    Status: Active
    • DWG: opens and saves, partial fidelity. Needs the free ODA File Converter or LibreDWG; geometry and layers only
    • DXF: opens and saves, partial fidelity. 2D geometry, layers and text carry over; blocks and dimensions can lose detail
    • PDF: saves only, full fidelity. TechDraw pages export to PDF; PDFs cannot be opened for editing
    • STL: opens and saves, full fidelity. Mesh format
    • STEP: opens and saves, full fidelity. Solid geometry exchange
    • +1 more

    Runs on Windows, macOS and Linux with no income limit or cloud account. The interface and modeling approach differ from Fusion's timeline.

  2. Rank 2: Onshape

    Best for browser-based parametric CAD

    License: Free tier
    • Web
    • iOS
    • Android
    Status: Verified
    • STEP: opens and saves, full fidelity. Geometry and face color carry over
    • STL: opens and saves, partial fidelity. Imported meshes are reference only and cannot be edited
    • DXF: opens and saves, full fidelity. 2D sketches and drawings
    • SLDPRT: opens only, partial fidelity. Imports as non-parametric geometry; exports STEP instead
    • SLDASM: opens only, partial fidelity. Import the assembly and its parts as a single zip file

    The Free plan is for non-commercial use and every document is public. Private documents need a paid plan. Imports Fusion designs as STEP, not .f3d. Free version: Free plan is for non-commercial use and all documents are public. Standard costs US$1,500 per user per year.

Situational

1 tool

Right for specific needs, or not yet mature enough to recommend widely.

  1. Rank 3: SolveSpace

    Best for lightweight constraint-based 3D sketching

    License: Open source
    • Windows
    • macOS
    • Linux
    Status: Active
    • STEP: saves only, partial fidelity. STEP export is listed on the project site; STEP import is not
    • STL: saves only, partial fidelity. Exports triangle meshes for 3D printing
    • DXF: opens and saves, partial fidelity. 2D geometry only

    A small, fast open-source tool for mechanical sketches and mechanisms. Exports STEP and STL for other software.

Sponsor this page: $149 for 30 days. Sponsors appear above the ranking, labeled; the ranking itself is not for sale.

Feature parity

How each alternative covers what people use Autodesk Fusion for. Numbers link to editor notes.

Feature parity with Autodesk Fusion
FeatureFreeCADOnshapeSolveSpace
Modeling
Parametric solid and surface modelingYesNote 1YesPartialNote 2
Assemblies and jointsPartialNote 3YesNote 4PartialNote 5
Documentation
2D drawings from modelsPartialNote 6YesNote 7PartialNote 8
Manufacturing
CAM toolpaths for CNC machiningPartialNote 9NoNote 10NoNote 11
Analysis
Simulation (FEA)PartialNote 12NoNote 13NoNote 14
Electronics
Electronics and PCB designNoNote 15NoNote 16No
Collaboration
Cloud data management and sharingNoNote 17YesNote 18No
Parity score43%57%21%
  1. FreeCAD, Parametric solid and surface modeling: Part Design and Sketcher build solids with a feature tree
  2. SolveSpace, Parametric solid and surface modeling: Constraint-driven sketches with extrude, revolve and boolean tools; no history timeline
  3. FreeCAD, Assemblies and joints: A built-in Assembly workbench with fewer joint types
  4. Onshape, Assemblies and joints: Mates and mate connectors
  5. SolveSpace, Assemblies and joints: Parts can be linked into assemblies with basic constraints
  6. FreeCAD, 2D drawings from models: TechDraw makes dimensioned sheets; the tools are less polished
  7. Onshape, 2D drawings from models: Drawings are part of the Free plan
  8. SolveSpace, 2D drawings from models: Dimensioned views and 2D export to DXF, PDF and SVG
  9. FreeCAD, CAM toolpaths for CNC machining: The CAM workbench covers 2.5D and 3-axis toolpaths with a manual setup
  10. Onshape, CAM toolpaths for CNC machining: CAM Studio is not part of the Free plan
  11. SolveSpace, CAM toolpaths for CNC machining: Exports vectors for laser and waterjet cutting; no toolpaths
  12. FreeCAD, Simulation (FEA): The FEM workbench runs CalculiX and other solvers; setup is manual
  13. Onshape, Simulation (FEA): Simulation is not part of the Free plan
  14. SolveSpace, Simulation (FEA): A constraint solver for linkages; no FEA
  15. FreeCAD, Electronics and PCB design: No PCB design; KiCad is the usual companion
  16. Onshape, Electronics and PCB design: PCB design is not available on the Free plan
  17. FreeCAD, Cloud data management and sharing: Files are local; share them with Git or a file service
  18. Onshape, Cloud data management and sharing: Cloud-native with version control and live sharing

Not covered by any free alternative yet: CAM toolpaths for CNC machining, Simulation (FEA), Electronics and PCB design. See all feature gaps

File formats

Can each alternative open and save Autodesk Fusion files?

Opening and saving Autodesk Fusion files
FormatFreeCADOnshapeSolveSpace
.f3dNoNote 1NoNote 2NoNote 3
.stepOpens and savesNote 4Full fidelityOpens and savesNote 5Full fidelitySaves onlyNote 6Partial fidelity
.stlOpens and savesNote 7Full fidelityOpens and savesNote 8Partial fidelitySaves onlyNote 9Partial fidelity
.dxfOpens and savesNote 10Partial fidelityOpens and savesNote 11Full fidelityOpens and savesNote 12Partial fidelity
  1. FreeCAD, .f3d: Fusion files do not open; export STEP from Fusion
  2. Onshape, .f3d: Fusion files do not import; export STEP from Fusion
  3. SolveSpace, .f3d: Fusion files do not open; use STEP or STL
  4. FreeCAD, .step: Solid geometry exchange
  5. Onshape, .step: Geometry and face color carry over
  6. SolveSpace, .step: STEP export is listed on the project site; STEP import is not
  7. FreeCAD, .stl: Mesh format
  8. Onshape, .stl: Imported meshes are reference only and cannot be edited
  9. SolveSpace, .stl: Exports triangle meshes for 3D printing
  10. FreeCAD, .dxf: 2D geometry, layers and text carry over; blocks and dimensions can lose detail
  11. Onshape, .dxf: 2D sketches and drawings
  12. SolveSpace, .dxf: 2D geometry only

What switching saves

Switching saves about $680 USD / ≈$969 CAD (estimated from the USD price) a year. Prices checked ; ≈ means converted from USD.

Based on Autodesk Fusion, 1-year subscription. Price source. USD to CAD at 1.4257 as of Oct 7, 2026.

About this page

Last verified . Ranking: tier first, then the published score.

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Related

Autodesk Fusion is a product of Autodesk, named here for comparison only. Platforms listed for Autodesk Fusion: Windows, macOS.