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KISSlicer vs FlashPrint: catalog facts
KISSlicer	FlashPrint
Best for: Fast, compact slicer that converts STL models into G-code for filament printers	Best for: Owners of FlashForge 3D printers
Free + paid options The single-extruder version is free. Pro and Premium licences unlock multi-extruder and advanced slicing.	Free Free download from FlashForge for use with its printers.
Windows, macOS, Linux	Windows, macOS, Linux
Slicing is quick and the interface stays simple, which makes it a light alternative when a full slicer… Full strengths for KISSlicer Slicing is quick and the interface stays simple, which makes it a light alternative when a full slicer suite feels like too much for a straightforward print.	Made by the printer manufacturer for its own machines Linux build available on Flathub
The free version is single-extruder only and closed source; multi-extruder printing and the advanced features need the… Full limitations for KISSlicer The free version is single-extruder only and closed source; multi-extruder printing and the advanced features need the paid Pro or Premium licences.	Aimed at FlashForge printers only Proprietary, closed source
Downloadable app	Downloadable app
Not open source	Not open source
License not stated	License: Proprietary
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Sources for KISSlicer kisslicer.com Catalog checked September 22, 2026	Official website Full listing and sources Sources for FlashPrint flashforge.com/pages/download-center Catalog checked October 1, 2026

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