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umu-launcher vs Heroic Games Launcher: catalog facts
umu-launcher	Heroic Games Launcher
Free Free and open source.	Free Free and open source under GPLv3, funded by donations.
Linux, Command line	Windows, macOS, Linux
Runs Proton outside Steam Uses the same runtime environment as Steam's Proton	Epic, GOG and Amazon Prime libraries in one launcher Wine Manager downloads and manages Proton-GE, Wine-GE and the macOS equivalents
Command-line only, no graphical interface Linux only	You still need accounts with Epic, GOG or Amazon to use their libraries It does not handle Steam; that is Steam’s own client
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
No account needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 20, 2026

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