QuantumLauncher

Spec sheet

Purpose

QuantumLauncher is an open-source Minecraft launcher with instance management and modding features.Read 11 Oct 2026 · mrmayman.github.io

Integrations

The mod store offers CurseForge and Modrinth backends.Read 11 Oct 2026 · mrmayman.github.io

Support

The maker directs users with issues or complaints to open an issue in the GitHub repository.Read 11 Oct 2026 · github.com

License

The launcher is licensed under GNU GPL v3, with some assets under additional licensing.Read 11 Oct 2026 · github.com

Automatic updates

YesRead 22 Sep 2026 · mrmayman.github.io

Built-in modpack catalog

YesRead 22 Sep 2026 · mrmayman.github.io

Downloads

Stable downloads are offered for Windows, macOS, and Linux, including platform-specific builds and Linux package options.Read 11 Oct 2026 · mrmayman.github.io

Instances

Instances isolate game versions so they do not clash.Read 11 Oct 2026 · github.com

Java runtime management

YesRead 22 Sep 2026 · mrmayman.github.io

macOS limitation

The FAQ says macOS may block the app because the maker cannot afford Apple's Developer ID fee and documents a terminal workaround.Read 11 Oct 2026 · mrmayman.github.io

Mod loader support

multipleRead 22 Sep 2026 · mrmayman.github.io

Mod management

Users can manage mods and mod loaders in one place and package and share mod collections with friends.Read 11 Oct 2026 · github.com

Mod store

Its built-in store lets users browse and install mods, mod loaders, resource packs, shaders, and modpacks.Read 11 Oct 2026 · mrmayman.github.io

Modpack import

bothRead 22 Sep 2026 · mrmayman.github.io

Offline mode

The launcher supports offline mode, which the maker says is at the user's own risk.Read 11 Oct 2026 · github.com

Older versions

It supports older Minecraft versions through Omniarchive, including skin and sound fixes and rare versions.Read 11 Oct 2026 · github.com

Performance

The maker describes the launcher as using minimal CPU and RAM and being lighter than the vanilla launcher and common alternatives.Read 11 Oct 2026 · mrmayman.github.io

Separate instances

YesRead 22 Sep 2026 · mrmayman.github.io

Plans and prices

Every QuantumLauncher plan and price →

Where Specifiction places it

• Minecraft Launchers#30 of 758.1