PixiJS
Game Engines & FrameworksFast 2D WebGL rendering engine for browser games
Replaces Adobe Animate runtime
Best API Game Engines & Frameworks for self-hosting
The 7 best API game engines & frameworks you can self-host, ranked by community traction.
PlayCanvas Engine
Game Engines & FrameworksOpen-source WebGL game engine for 3D browser games
Replaces Unity WebGL
TrinityCore
Game Engines & FrameworksMMORPG server emulator for World of Warcraft
Replaces official WoW servers
Cocos Engine
Game Engines & FrameworksOpen-source cross-platform 2D and 3D game engine
Replaces Unity
KAPLAY
Game Engines & FrameworksFun JavaScript library for making browser games fast
Replaces Phaser
Crafty Controller
Game Engines & FrameworksWeb-based Minecraft server management panel
Replaces Minecraft Realms, Pterodactyl
Sapphire Server
Game Engines & FrameworksOpen-source server emulator for Final Fantasy XIV
Replaces official FFXIV servers
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Every option here is open-source and self-hostable, tagged API within the game engines & frameworks category. Compare them on the individual app pages for setup difficulty and resource requirements.