Colyseus

Colyseus is an open-source multiplayer framework that makes it easy to build, scale, and operate real-time games.

We provide a fast, lightweight server framework with built-in state synchronization, authoritative logic, matchmaking, and room management. Colyseus is used by studios of all sizes to power multiplayer experiences across Web, mobile, console, and desktop.

Our ecosystem includes the Colyseus Server, client SDKs for multiple engines (Unity, JavaScript/TypeScript, Defold, etc), cloud deployment tools, and an active community supporting millions of players worldwide.

We focus on helping developers ship multiplayer features quickly, maintain them easily, and scale reliably - without locking them into a proprietary backend.