OpenMC
OpenMC: A portable, cross-platform launcher for separate Minecraft instances and modpacks. Ranked #59 of 75 in Minecraft Launchers by our editors (5.4/10); pricing: Open source; best for open-source users needing portable installs.
At a glance
- Editor score5.4 / 10
- PricingOpen source
- Best forOpen-source users needing portable installs
- Paid fromFree
- Facts checked22 Sep 2026
Where it wins
- Manages multiple Minecraft installations in one launcher
- Supports several Minecraft mod loaders
- Downloads modpacks from multiple platforms
Where it doesn't
- No published GitHub releases
- Build documentation includes older dependency references
- Separate workflows may add setup complexity
Our verdict on OpenMC
OpenMC is a third-party desktop launcher for Minecraft users who want to manage separate installations from one application. It supports Windows, macOS, and Linux, with a portable design intended for users who prefer an installation they can move between locations. Its open-source distribution under the Apache License 2.0 also suits users who value publicly available software code and community-maintained development.
The launcher’s main strength is breadth within the Minecraft installation workflow. OpenMC can manage multiple installations, support several mod loaders, and download modpacks from several platforms. Separate installation and build workflows provide a structure for keeping ordinary game installations distinct from builds or customized setups. The project is implemented primarily with Qt5 and C++, giving it a desktop-focused foundation across its supported operating systems. Users who routinely switch between modded configurations or maintain more than one Minecraft setup should find this combination more relevant than a launcher focused on a single installation.
Setup requires more attention than the feature list alone suggests. Build instructions are available for Linux, Windows, and macOS, but parts of the documentation appear inherited from the upstream MultiMC project and include older dependency references. The repository is live, yet it has no published GitHub releases, so the distribution path is oriented toward the project and its build documentation rather than a conventional release catalogue. OpenMC is a good fit for technically comfortable users who want portability, open-source licensing, and multiple installation workflows. Users seeking a highly packaged experience with a formal release history or minimal setup work should consider a different launcher.
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OpenMC pricing
OpenMC fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Free |
| Desktop OS support | Not verified |
| Separate instances | Yes |
| Modpack import | Not verified |
| Mod loader support | Multiple |
| Java runtime management | Not verified |
| Built-in modpack catalog | Not verified |
| Automatic updates | Not verified |
| Deployment | Desktop |
| Platforms | Windows, macOS, Linux |
| Support | Tickets |
| Built for | Solo, Small business (editorial estimate) |
| Pricing | Open source |
| Website | github.com |
| Facts checked | 22 Sep 2026 |
Alternatives to OpenMC
- Prism LauncherA free, open-source launcher for organizing isolated Minecraft instances and modpacks.9.4
- RefractA broad, free launcher for players moving libraries and modpacks from other launchers.9.2
- Spectra LauncherA free, open-source launcher with strong instance, mod, and modpack workflows.9.1
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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