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Free and open source under the LGPL 3.0. An UltiMaker account is optional and only needed for cloud features.

• Profiles for hundreds of printers, not just UltiMaker's own
• Recommended presets hide the settings until you want them
• Layer preview shows the toolpath before you start the print
• Plugin marketplace for model sources and post-processing scripts

• Handles both filament and resin printers in one program
• Per-layer setting changes and painted supports and seams
• Profiles for printers well beyond Prusa's own range
• No account needed, and the project says so plainly

• Heavier and slower to start than the newer slicers
• Hundreds of settings once you leave the recommended mode
• Calibration tooling is thin compared with OrcaSlicer

• Linux builds come only through Flathub
• Tuned first for Prusa hardware; other machines need profile work
• The interface exposes fewer calibration tools than OrcaSlicer

• ultimaker.com/software/ultimaker-cura
• github.com/Ultimaker/Cura

• prusa3d.com/prusaslicer
• github.com/prusa3d/PrusaSlicer