Minecraft 1.21.3 Server Status: Which Software Is Out?
Minecraft 1.21.3 was released on 23 Oct 2024. 13 of 17 server programs tracked here have a 1.21.3 build so far. Updated automatically from each project's API, last check 28 Oct 2026, 12:47 UTC.
| Software | 1.21.3 build | Channel | First seen / date | Previews |
|---|---|---|---|---|
| Vanilla | available | stable | 23 Oct 2024 | — |
| Paper | 83 | stable | 28 Mar 2025 | — |
| Spigot | 4398 | stable | 3 Dec 2024 | — |
| CraftBukkit | available | stable | 31 Jul 2026 | — |
| Purpur | 2358 | stable | 4 Dec 2024 | — |
| Folia | not yet | — | — | — |
| Pufferfish | 27 | stable | 4 Dec 2024 | — |
| Leaves | 91 | stable | 23 Jan 2025 | — |
| Leaf | available | stable | 19 Feb 2025 | — |
| Fabric | available | stable | 31 Jul 2026 | — |
| Quilt | available | stable | 31 Jul 2026 | — |
| Forge | 53.1.16 | stable | 15 Oct 2026 | — |
| NeoForge | 21.3.100 | stable | 15 Oct 2026 | — |
| SpongeVanilla | 1.21.3-13.0.1-RC2249 | stable | 23 Oct 2024 | — |
| Mohist | not yet | — | — | — |
| Arclight | not yet | — | — | — |
| Magma | not yet | — | — | — |
"Experimental" means the project has published builds but not yet marked one stable — test before moving a live server. Plugins and mods usually need their own updates too. See how to update safely.