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nookdb

NookDB vs RxDB

Pick RxDB if…

  • You need your database to run in the browser, Node.js, or React Native simultaneously.
  • Server sync is a core requirement and you want a battle-tested replication protocol.
  • Your team is already deep in the RxJS ecosystem and reactive streams are how you think.

Pick NookDB if…

  • You are building an Electron desktop app and the database lives only on that machine.
  • You need Rust-backed ACID durability without a cloud dependency in the critical path.
  • Schema-first TypeScript types matter more than an observable pipeline.

Where they overlap

Both RxDB and NookDB treat the schema as the source of truth: you declare your collections and field types up front, and the library enforces them at runtime. Both expose reactive query primitives so your UI can re-render when data changes without manual polling. Both are embedded — no separate database server process to manage. If you have tried one, the mental model of the other will feel familiar within an afternoon.

What’s genuinely different

RxDB’s architecture is built around sync. Its storage layer is an abstraction over pluggable backends (IndexedDB, SQLite, LokiJS), and the replication protocol is a first-class citizen. NookDB does not do sync at all — deliberately. The storage layer is a single Rust crate built on redb, a memory-mapped B-tree with crash-safe writes. That constraint lets NookDB make stronger per-write durability guarantees than any pluggable-backend design can make uniformly. If your workload is one machine, no cloud, NookDB keeps that surface area small.

— Ömer, Nookwright