UI generation gap
ATLauncher uses Java Swing with the modern FlatLaf look-and-feel layered on top. That's a real step up from classic Swing, but it still trails native modern launchers on density, motion, and platform feel. GDLauncher is built with Solid and uses a custom UnoCSS-based design system with native-feeling drag and drop, animations, and grouping.
CurseForge integration
ATLauncher and GDLauncher both browse and install CurseForge packs from inside the launcher, so the everyday experience is similar. The friction lives at the edges: when a mod author has opted out of third-party API access for their file, ATLauncher asks you to click through each blocked link and download those files manually in a browser. GDLauncher's CurseForge partnership fetches those files directly, so installs stay one-click even when packs include blocked mods.
ATLauncher packs vs Cloud Instance Sharing
ATLauncher hosts its own pack ecosystem. GDLauncher doesn't compete on that, instead, Cloud Instance Sharing lets anyone share their exact setup (mods, configs, settings) with a single code. Different philosophies; pick what fits how you and your friends play.
The verdict
ATLauncher is a solid choice if you specifically want ATLauncher's curated pack list or you're already used to its workflow. GDLauncher's strengths are a more modern UI, deeper CurseForge integration, Cloud Instance Sharing, and built-in server management. For most modded Minecraft players in 2026, GDLauncher's experience is closer to what you'd expect from a modern app.