O
OrcaSlicer
3D printing & CAMOpen-source slicer with built-in printer calibration tools
- Stars
- ★ 16k
- Licence
- AGPL-3.0
- Updated
- Commercial OK
Alternative to Simplify3D
Free alternatives to Simplify3D
Last updated · 4 options
Quick answer: OrcaSlicer has the most stars on its repository of the 4 options here (★ 16k), followed by PrusaSlicer (★ 9.4k). Stars show popularity, not fit, so check formats, platforms and licence for your own work.
Commercial 3D-printing slicer. Here are 4 free options, most-starred first.
What Simplify3D costs
- Simplify3D licence$199 per user
From the vendor's own pricing page (simplify3d.com), checked 19 Oct 2026. Prices change and may exclude tax, so check before you decide.
PrusaSlicer
3D printing & CAMFeature-rich open-source slicer for FFF and resin printers
- Stars
- ★ 9.4k
- Licence
- AGPL-3.0
- Updated
- Commercial OK
Alternative to Simplify3D
UltiMaker Cura
3D printing & CAMPopular open-source 3D-printing slicer
- Stars
- ★ 7.1k
- Licence
- LGPL-3.0
- Updated
- Commercial OK
Alternative to Simplify3D
Kiri:Moto
3D printing & CAMBrowser-based slicer and CAM for 3D printers, CNC and lasers
- Stars
- ★ 921
- Licence
- MIT
- Updated
- Commercial OK
Alternative to Simplify3D, Fusion 360
No tools match these filters. Suggest one.
Format and fit filters only use details we found in each project's own documentation. A tool that isn't shown may still support it.
FAQ
Is there a free alternative to Simplify3D?
Yes. CADAlts lists 4 options: OrcaSlicer, PrusaSlicer, UltiMaker Cura and Kiri:Moto.
How much does Simplify3D cost?
Simplify3D licence: $199 per user. These are the vendor's published prices, checked 19 Oct 2026 on simplify3d.com.
Which Simplify3D alternatives are open source?
OrcaSlicer (AGPL-3.0), PrusaSlicer (AGPL-3.0), UltiMaker Cura (LGPL-3.0) and Kiri:Moto (MIT).
Which Simplify3D alternatives run on a Mac?
OrcaSlicer, PrusaSlicer and UltiMaker Cura. The other listed here isn't listed for macOS.
Related categories: 3D printing & CAM
Check file compatibility before switching. Free tools import STEP, DXF and other neutral formats well, but native SolidWorks, Altium or Revit files, drawing standards and PDM workflows may not carry over cleanly.