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TanStack DB ​

Reactive client store for building super-fast apps. With sub-millisecond reactivity and instant local writes.

Documentation
GitHub

What is TanStack DB? ​

TanStack DB is a reactive client-side database designed for local-first web applications. It provides a unified data layer that integrates with multiple sync backends, including Postgres Sync and Durable Streams.

Key features:

  • Reactive queries — UI components automatically update when underlying data changes
  • Optimistic updates — instant responsiveness with automatic conflict resolution
  • Multi-source sync — combine data from Postgres Sync and Durable Streams in one client database
  • Framework integrations — first-class support for React, Vue, and other frameworks

Use cases ​

TanStack DB is ideal for:

  • Local-first applications that need offline support and instant updates
  • Collaborative apps where multiple users edit shared data
  • Applications combining structured data (via Postgres Sync) with real-time streams (via Durable Streams)
  • Any app that needs a reactive, queryable client-side data store

How it works ​

TanStack DB acts as the client-side data layer in the Electric ecosystem. It receives data from multiple sources and provides a unified, reactive interface for your application.

Postgres Sync ────────────┐
(structured data)         │
                          ├───→ TanStack DB ───→ React/Vue/etc.
Durable Streams ──────────┘     (client DB)      (reactive UI)
(streams, AI, sessions)

Data flows from your backend through Electric's sync primitives into TanStack DB, which then powers your reactive UI components.

Learn more ​

For an interactive guide to TanStack DB, how it works and why it might change the way you build apps, see What TanStack DB is.

Showcase ​

See applications built with TanStack DB in the TanStack Showcase.

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More information ​

See how you can combine TanStack DB with other Electric products to build fast, modern UIs.

Documentation
GitHub