Colyseus alternative

What Colyseus is

Colyseus is an open-source Node.js framework: you write room logic in TypeScript on the server, and state is synchronized to clients with schema-based delta encoding. You self-host it, or pay for Colyseus Cloud.

Side by side

Checked September 2026 against public documentation. Tell us if something changed: contact@lannetech.ae.

Choose Colyseus if…

• Your game needs a fully server-simulated world (physics on the server, hidden information).
• You want to own and modify the server source.

Choose Multiplayer API if…

• You do not want to write or operate server code at all.
• Declarative rules (who writes what, at what rate, within which bounds) are enough authority for your game — true for most casual, turn-based, co-op and .io games.
• You want positions to travel peer-to-peer instead of through a server you pay for.

Moving from Colyseus: what maps to what

• Room classes on the server → presets plus declarative rules. Logic that validated moves (“is it this player's turn?”) becomes cas and immutable rules.
• Schema state → the JSON shared state. room.state.watch('players.*.hp', …) replaces schema change callbacks.
• onMessage / broadcast → room.emitEvent(topic, data) for ordered, guaranteed messages; high-frequency input moves to room.send().
• Reconnection tokens → nothing to do: rejoining is reconnecting, state survives, late joiners are caught up.
• Your deployment → removed. The game becomes a static site.

The concepts are covered in full in the documentation and in llms-full.txt, which a coding agent can use to do the port for you.

Try it in one call

curl -X POST https://multiplayerapi.com/v1/games \
  -H 'Content-Type: application/json' \
  -d '{"name":"My Game","preset":"realtime_arena"}'

Returns a public key, a secret key and a sandbox with 2 live rooms for 24 hours. No account, no card.