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Repetier-Server vs Mainsail: catalog facts
Repetier-Server	Mainsail
Best for: Running several 3D printers from one local server without a subscription	Best for: Control a Klipper printer through a browser dashboard
Free + paid options Free version available; Pro is a one-time purchase for five installations with no subscription.	Free Free and open source. Hosting, hardware and any external services are separate.
Web, Self-hosted	Self-hosted, Web
Runs several printers from one installation Multiple webcams per printer with timelapse All 4 strengths for Repetier-Server Runs several printers from one installation Multiple webcams per printer with timelapse G-code manager with 3D and 2D previews Touchscreen interface for printer-side displays	Shows printer status and job controls Provides configuration and print-file management
Some features require the paid Pro version Closed source	Requires Klipper and a compatible Moonraker installation.
Downloadable app, Self-hosted	Self-hosted, Web application
Not open source	Open source
License not stated	License: GPL-3.0
Not stated if an account is 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-Server repetier-server.com Catalog checked September 24, 2026	Official website Full listing and sources Sources for Mainsail docs.mainsail.xyz github.com/mainsail-crew/mainsail Catalog checked September 22, 2026

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