PartyKit

PartyKit gives you programmable WebSocket servers at the edge. Instead of managed real-time APIs, you get actual servers running your code—with the simplicity of serverless deployment.

Key Features:

• Edge Servers - Code runs close to users globally
• WebSocket Native - Full WebSocket control
• Stateful - Per-room state that persists
• Simple Deployment - Deploy like serverless functions

Why PartyKit:

• Flexibility - Write any real-time logic
• Performance - Edge deployment means low latency
• State - Built-in durable storage per party
• Developer Experience - Local dev, easy deployment

PartyKit capabilities:

• Rooms - Isolated instances for groups
• Hibernation - Scale to zero when inactive
• Cron - Scheduled tasks in parties
• Integrations - Y.js, Replicache compatibility

PartyKit is compelling when you need real-time infrastructure but generic pub/sub isn't enough. The ability to run arbitrary code at the edge, close to users, enables experiences other platforms can't match.