Open source alternatives to cloudflare/durable-objects

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cloudflare/durable-objects

Stateful coordination with RPC, SQLite, and WebSockets

Build stateful, coordinated applications on Cloudflare's edge with persistent storage and RPC methods. Designed for coordination patterns: chat rooms, multiplayer games, booking systems, and per-entity state management using deterministic routing via getByName(). Includes SQLite storage with synchronous sql.exec(), KV storage, alarms for scheduled per-entity work, and WebSocket support.