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Free alternatives to SOLIDWORKS

Best free option: Onshape (Strong). Switching saves about $2,820 USD a year.

SOLIDWORKS, SOLIDWORKS Design Standard, per user

$2,820 USDa year

≈$4,020.47 CAD (converted from USD)

Every pick below has a free version.

Runs on
  • Windows
Key file formats
.sldprt.sldasm.step.stl

Filter alternatives

2 alternatives

Strong

2 tools

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

  1. Rank 1: Onshape

    Best for browser CAD on non-commercial projects

    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. Runs in a browser, so no Windows requirement. Free version: Free plan is for non-commercial use and all documents are public. Standard costs US$1,500 per user per year.

  2. Rank 2: FreeCAD

    Best for open-source parametric part design

    License: Open source
    • Windows
    • macOS
    • Linux
    Status: Unknown
    • 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 license cost. The workflow differs, and migrating means exporting STEP files from SOLIDWORKS.

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 SOLIDWORKS for. Numbers link to editor notes.

Feature parity with SOLIDWORKS
FeatureOnshapeFreeCAD
Modeling
Parametric part modeling with a feature treeYesYesNote 1
Assemblies and matesYesNote 2PartialNote 3
Sheet metal and weldmentsYesNote 4PartialNote 5
Documentation
Detailed 2D drawings from modelsYesNote 6PartialNote 7
Interoperability
Opens and saves SLDPRT and SLDASM filesPartialNote 8NoNote 9
Parity score90%50%
  1. FreeCAD, Parametric part modeling with a feature tree: Part Design and Sketcher build solids from a feature tree
  2. Onshape, Assemblies and mates: Mates and mate connectors
  3. FreeCAD, Assemblies and mates: A built-in Assembly workbench with fewer mates and lighter large-assembly handling
  4. Onshape, Sheet metal and weldments: Sheet metal tools are built in
  5. FreeCAD, Sheet metal and weldments: Sheet metal tools come from the SheetMetal workbench
  6. Onshape, Detailed 2D drawings from models: Drawings are part of the Free plan
  7. FreeCAD, Detailed 2D drawings from models: TechDraw makes dimensioned sheets with fewer drafting standards
  8. Onshape, Opens and saves SLDPRT and SLDASM files: Imports SLDPRT and zipped SLDASM files as static geometry; exports STEP, not SOLIDWORKS files
  9. FreeCAD, Opens and saves SLDPRT and SLDASM files: SLDPRT and SLDASM do not open; export STEP from SOLIDWORKS

Not covered by any free alternative yet: Opens and saves SLDPRT and SLDASM files. See all feature gaps

File formats

Can each alternative open and save SOLIDWORKS files?

Opening and saving SOLIDWORKS files
FormatOnshapeFreeCAD
.sldprtOpens onlyNote 1Partial fidelityNoNote 2
.sldasmOpens onlyNote 3Partial fidelityNoNote 4
.stepOpens and savesNote 5Full fidelityOpens and savesNote 6Full fidelity
.stlOpens and savesNote 7Partial fidelityOpens and savesNote 8Full fidelity
  1. Onshape, .sldprt: Imports as non-parametric geometry; exports STEP instead
  2. FreeCAD, .sldprt: SolidWorks files do not open; export STEP from SolidWorks
  3. Onshape, .sldasm: Import the assembly and its parts as a single zip file
  4. FreeCAD, .sldasm: SolidWorks files do not open; export STEP from SolidWorks
  5. Onshape, .step: Geometry and face color carry over
  6. FreeCAD, .step: Solid geometry exchange
  7. Onshape, .stl: Imported meshes are reference only and cannot be edited
  8. FreeCAD, .stl: Mesh format

What switching saves

Switching saves about $2,820 USD / ≈$4,020 CAD (estimated from the USD price) a year. Prices checked ; ≈ means converted from USD.

Based on SOLIDWORKS Design Standard, per user. 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.

Something wrong or out of date? Report outdated info.

Related

SOLIDWORKS is a product of Dassault Systèmes, named here for comparison only. Platforms listed for SOLIDWORKS: Windows.