Cactus MC Launcher vs Onyx Launcher

Cactus MC Launcher is a free desktop launcher for managing Minecraft instances, modpacks, and dedicated servers on Windows, macOS, and Linux. It supports separate instances, Java runtime management, automatic updates, and a built-in modpack catalog. The launcher works with mods, resource packs, shaders, and modpacks from Modrinth and CurseForge. Available loaders include Vanilla, Fabric, Quilt, Forge, and NeoForge. Instances can be grouped by version and loader, with custom icons and cover art. Server tools include a live console, world management, ops and whitelist controls, and one-command sharing. The interface can be customized with backgrounds, gradients, decor, a movable dock, and toggleable click sounds. Cactus MC Launcher is built with Tauri and Rust, contains no ads, and does not track users. It is made by Ladvace and released under AGPL-3.0; the download page lists version 1.5.1. The project provides a GitHub link and a Discord community link. It is not an official Minecraft product and is not associated with Mojang or Microsoft.

Onyx Launcher is a free, open-source desktop Minecraft launcher for Windows and Linux. It manages separate instances, imports modpacks and supports Fabric, NeoForge, Forge, Quilt and Vanilla. A built-in Modrinth catalog lets users browse, install and update mods and modpacks, while automatic updates and Java runtime management are included. Onyx can detect, download and isolate Eclipse Temurin Java 8, 17 or 21 as needed. Diagnostic features measure in-game FPS, average frame times and stutters, analyze logs, track memory and garbage-collection pauses, and use Crash Bisect to look for conflicting mods through controlled launches. World Guard creates safety snapshots before risky operations and supports rollbacks. Ghost Mode unloads the launcher window, WebContents and GPU processes from memory when Minecraft starts. Microsoft sign-in uses OAuth Device Flow, and offline mode with custom skins is available. Windows builds are currently unsigned; published SHA-256 checksums can be checked. The MIT-licensed project says it is independent of Microsoft, Mojang Studios and Modrinth.