# TanStack Query

> MIT server-state cache for async data (React Query lineage)

**Category:** Libraries  
**Pricing:** open-source  
**URL:** https://tanstack.com/query  
**GitHub:** https://github.com/TanStack/query  
**Added:** 2026-09-06

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## The Hook

TanStack Query is the server-state cache when fetching, caching, and invalidation should not live in your UI store.

## What's Good

MIT. Declarative fetch/cache/invalidate for React, Vue, Solid, Svelte, Angular. Devtools, optimistic updates, infinite queries. De-facto async server-state default outside full RSC frameworks.

## The Catch

Server-state cache library; not SaaS. Not a global client store (that is Zustand/Redux). Not tRPC itself — pairs with it. You still own the API and auth.

## Verdict

MIT server-state cache. Free library; not a BaaS.