Build Multiplayer Features In 15 Minutes.

Room Service provides CRDT-like data structures which are the building blocks of multiplayer features you might find in products like Figma, Airtable, and Trello.

Start Building
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React
JavaScript
// Real-time state, stored in composable CRDTs.
const [list, setList] = useList("my-room", "todos")
// Make changes like it's single player,
// Room Service makes it multiplayer.
//
// Indexes & other conflicts are handled automatically
// while preserving user intent.
setList(list.insertAfter(2, "water plants 🌿"))
~4kb SDK
TypeScript support
Immutable objects
Local-first updates
Built-in CRDTs

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Performant & stable

Local-first updates with built-in CRDTs

Multiplayer systems need to update optimistically, without waiting for a server to confirm each change. If you don’t, you add an extra ~100ms of latency, just from the speed of light alone. But doing this means each user is an actor in a complex and hard to manage distributed system.

This stuff is tricky.

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For ambitious projects

Scaleable multiplayer infrastructure

We build and manage the stateful WebSocket infrastructure specifically designed for real-time collaboration, not just auto-updating charts or push notifications.