ATLauncher vs MultiMC

ATLauncher is a Minecraft launcher for browsing, downloading and installing modpacks. Its catalog includes packs from ATLauncher, CurseForge, Modrinth and Technic, and it supports multiple mod loaders and pack imports. Users can maintain separate instances so a new installation does not affect an existing one; the launcher automatically selects the Java version for a pack.

The launcher supports multiple accounts, including Mojang and Microsoft accounts and Xbox Game Pass subscribers. Instance management can install mods, maps and resource packs from CurseForge and Modrinth. It also offers one-click save backups and tools to create and run servers for ATLauncher modpacks. ATLauncher is free and has downloads for Windows, macOS and Linux, as well as a Jar download. Playing modpacks requires a purchased Minecraft account. The site no longer accepts submissions for its own pack platform and recommends Modrinth or CurseForge for sharing packs. For help, users can turn to Discord; contact form requests needing a response are answered within 24 hours.

MultiMC is an alternative launcher for Minecraft that keeps multiple game instances separate. Each instance can have its own mods, resource packs, and saves, and users can import or export instances for sharing. It imports modpacks from Modrinth, CurseForge, FTB, Technic, ATLauncher, and FTB legacy, and includes a built-in modpack catalog. MultiMC also manages worlds and resource or texture packs, with controls for Java settings and runtimes. Color-coded logs provide extra diagnostic information, and users can stop Minecraft if it crashes or freezes. Automatic updates are supported. Downloads are available for Windows, macOS 10.13 or newer, and Linux distributions; Linux installations require Qt5 and may need distribution-specific packages. Designed to run in the background, including on older machines, MultiMC is free to use. A listed Patreon support option is priced on request; supporters get an app credit mention and a Discord role.