Launch Minecraft with HMCL, a cross-platform launcher with a range of configuration options.
Open source
24 alternativesQuantum Launcher
Quantum Launcher supports lightweight, cross-platform Minecraft launching and instance management.
About Quantum Launcher
Quantum Launcher is an open-source Minecraft launcher for managing separate game instances on Windows, macOS, and Linux, with FreeBSD supported when building from source. It includes a built-in store for mods and mod loaders, supports old versions via Omniarchive with skin and sound fixes, and can package instances for sharing.
Stable releases are provided for Windows, macOS, and Linux, with additional install options including Flatpak, Fedora COPR, and Nix. The project notes that offline mode is available but at the user's own risk.
Key features
- Isolate Minecraft versions using separate instances
- Install mods and mod loaders from built-in store
- Launch old Minecraft versions via Omniarchive support
- Apply skin and sound fixes to old versions
- Package instances to share with others
- Install via Flatpak, COPR, Nix, or source build
Best for: Minecraft players who manage multiple versions or modded setups and want an open-source, cross-platform launcher.
Good for
- Most code licensed under GPL-3.0
- Separate instances isolate game versions to avoid clashes
- Multiple install methods including GitHub Releases, Flatpak, COPR, and Nix
Watch out for
- Offline mode is supported but described as at own risk
- Stable releases listed only for Windows, macOS, and Linux
- Debug builds have worse performance and much larger artifacts
Quantum Launcher at a glance
- Category
- Gaming › Game Guides, Wikis & Tools
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Quantum Launcher FAQ
Where does Quantum Launcher store files?
Windows: AppData/Roaming/QuantumLauncher, macOS: Library/Application Support/QuantumLauncher, Linux/FreeBSD: ~/.local/share/QuantumLauncher, with instances under instances/YOUR_INSTANCE/.
How can I install Quantum Launcher?
Download stable releases for Windows, macOS, and Linux from the website or GitHub Releases, use Flatpak, Fedora COPR, or Nix, or build from source with cargo run --release.
Does Quantum Launcher support offline mode?
Yes, but the project states it is at your own risk and notes that users should buy the game.
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