ElyPrism Launcher (1.21.8, 1.20.1) – Alternative Minecraft Launcher with Ely.by Integration

The ElyPrism Launcher (1.21.8, 1.20.1) is a community-driven fork of Prism Launcher, designed specifically for players who want support for Ely.by accounts while still maintaining compatibility with official Microsoft (MSA) accounts. This launcher is lightweight, highly customizable, and offers advanced modpack management along with enhanced privacy and offline play support.

Features:

• Ely.by Integration
  Full support for Ely.by alternative accounts, allowing login and gameplay with OAuth2 authentication. No sensitive data is handled by the launcher directly authentication is securely processed via Ely.by’s official site.
• Skin Support on All Servers
  Implements Ely.by’s official Authlib patch, which allows your skin to be visible even on servers that don’t support external skin systems or plugins.
• Multi-instance Management
  Create and manage multiple Minecraft instances with different modloaders, resource packs, shader configurations, and mod sets, making it perfect for testing and switching between play styles.
• Modpack & Mod Integration
  Built-in support for Modrinth and CurseForge APIs. You can auto-download and update mods, modpacks, and even auto-install Forge, Fabric, Quilt, NeoForge, and OptiFine loaders without manual setup.
• Lightweight Performance
  Uses the Qt framework, which is optimized for low memory and CPU usage ideal for older PCs or minimal systems.
• Offline Play Support
  No DRM restrictions. Once authenticated, you can play offline without repeated copyright or login checks, making it flexible and independent of server-side login availability.

Screenshots:

Comparison:

Requires:

Java

Java Runtime Environment

Java JDK Adoptium