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LaunchBox vs RomM: catalog facts
LaunchBox	RomM
Freemium The core launcher is free. Big Box and premium features require a paid licence.	Free The open-source software is available without a license fee. Hosting is separate.
Windows	Web, Self-hosted
Huge metadata and artwork database with automatic importing Big Box mode is built for arcade cabinets and controller-only use	Web library with metadata, artwork and in-browser play Save synchronisation across devices through the server
Big Box and several features require a paid premium licence Windows only, closed source	Docker deployment and a database to maintain In-browser emulation performance is limited compared with native emulators
Downloadable app	Self-hosted, Web application
Closed source	Open source
License not stated	License: AGPL-3.0
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 Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.