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Repetier-Host vs Simplify3D: catalog facts
Repetier-Host	Simplify3D
Best for: Driving an FDM printer directly from a desktop PC	Best for: Prepare and preview print jobs with a commercial 3D slicer
Free Free download.	Paid Requires a paid license or subscription. Trial availability and licensing depend on the edition.
Windows, macOS, Linux	Windows, macOS, Linux
Several slicers bundled in one program Layer-by-layer print preview All 3 strengths for Repetier-Host Several slicers bundled in one program Layer-by-layer print preview Prints over USB, network or SD card	Provides configurable slicing processes Includes support-generation and toolpath controls
Mac version lags behind at 1.2.1 Linux build depends on Mono All 3 limitations for Repetier-Host Mac version lags behind at 1.2.1 Linux build depends on Mono Infrequent releases	Requires a paid license and an appropriate printer profile.
Downloadable app	Downloadable app
Not open source	Not open source
License not stated	License not stated
No account needed	Not stated if an account is needed
Offline features available	Not stated if it works offline
Official website Full listing and sources Sources for Repetier-Host repetier.com Catalog checked September 23, 2026	Official website Full listing and sources Sources for Simplify3D simplify3d.com Catalog checked September 22, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.