Krypton vs Lithium
Krypton
github.comLithium
github.comSide by side
| Figure | Krypton | Lithium |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | Yes | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 2 | 2 |
| Spec score · Minecraft Performance Mods | 8.5 (#2) | 7.9 (#6) |
| Client and server | The wiki says Krypton runs on both client and server, with features aimed mainly at servers. | It works on both client and server, and servers can install it without requiring clients to install it, or vice versa. |
| Compatibility | The FAQ reports compatibility with Fabric API, Lithium, Sodium, Phosphor, and Immersive Portals as specified there. | The project describes Lithium as compatible with most other mods and suitable for complex gameplay while preserving vanilla behavior. |
| License | The project is licensed under LGPL-3.0-only. | Lithium is licensed under GNU LGPLv3. |
| Mod loaders | CurseForge lists Fabric and Quilt as supported mod loaders. | The project’s GitHub page lists Fabric and NeoForge support; Modrinth also lists Quilt. |
| Purpose | Krypton is a Fabric mod that optimizes the Minecraft networking stack and entity tracker. | Lithium is a free, open-source Minecraft mod that optimizes game systems to improve performance. |
| Support | Support is provided on a best-effort basis, and the maker does not guarantee stability, compatibility, or support for every setup. | The project points users to GitHub issues for problems and its Discord community for installation help and technical support. |
Plans
In their own words
Krypton
Krypton is a free Fabric mod that optimizes Minecraft networking and entity tracking, with its performance work directed mainly at servers. It works on both clients and servers, including dedicated servers. Its network handlers are based on optimized Netty handlers from the Velocity proxy, using native code where appropriate. Flush consolidation is intended to reduce server CPU use and tick times and lessen the impact of speculative-execution hardware vulnerabilities. Other small optimizations target memory use and packet serialization speed. Krypton is tuned for Linux, though it should work wherever Minecraft can run. CurseForge lists Fabric and Quilt as supported loaders. The project aims to work with Fabric API, Lithium, and Sodium; compatibility with other mods is best effort. It is licensed under LGPL-3.0-only, and the maker does not guarantee stability, compatibility, or support for every setup. The project is described as feature-stable, while updates for newer Minecraft versions depend on the maker's availability and need. Listed compatibility includes Minecraft Java Edition versions 1.16.2 through 1.16.5, 1.17.x, 1.18.1 through 1.18.2, 1.19.x, 1.20.x, 1.21.x, and 26.1 through 26.3.
Lithium
Lithium is a free Minecraft mod that optimizes game systems to improve performance. Its work covers physics, mob AI, block ticking, world generation, chunk loading, explosions and redstone wire calculations. It runs on both client and server, but does not need to be installed on both sides. The project says it does not alter game mechanics or visuals and is compatible with most other mods. Lithium supports Fabric and NeoForge. Stable optimizations are active after installation without extra configuration; players can disable individual patches to address bugs or mod compatibility issues, though changes take effect only after restarting the game. The project directs downloads through Modrinth or CurseForge. For multiplayer server administrators, it says improved tick times can let hardware support more loaded entities, chunks and players. In single-player, it optimizes Minecraft’s internal server and may free processor capacity for frame rates and responsiveness. Automated bleeding-edge builds may include unfinished code, bugs or crashes, and are intended for people comfortable debugging software.