𝗧𝗵𝗲 𝗤𝘂𝗲𝘀𝘁𝗶𝗼𝗻 𝗧𝗵𝗮𝘁 𝗗𝗲𝗰𝗶𝗱𝗲𝘀 𝗬𝗼𝘂𝗿 𝗦𝘁𝗮𝘁𝗲 𝗦𝘁𝗮𝗰𝗸
Stop comparing Redux to React Query.
It is like asking if you want a hammer or a screwdriver before you know what you are building. Redux, React Query, and Zustand all solve different problems.
The real decision comes from one question: Who owns the source of truth for each piece of state?
You have two types of truth.
- Owned Truth The client is the source. This includes things like:
- Is the sidebar open?
- What is the current theme?
- Which step of a form is active? This state lives and dies by your local decisions. It does not need to re-verify itself with a server.
- Borrowed Truth The source lives on the server. The client only holds a mirror of that data. This data changes behind your back. Your job is to manage:
- Staleness
- Invalidation
- Refetching
- Caching
Most developers struggle because they use one tool for both. When you try to manage borrowed truth in a client-side reducer, you end up re-writing React Query poorly. You manually write loading states, error handling, and caching. This creates huge amounts of unnecessary code.
Split them to win.
Use React Query for borrowed truth. It handles the hard synchronization work. Use Zustand for owned truth. It handles simple value storage with zero ceremony.
Do not dump server data into Zustand. Keep that boundary clear.
What about Redux and Sagas? Sagas are not for data fetching. They are for orchestrating complex processes over time. Use them if your app handles:
- Concurrent, cancellable flows.
- Real-time websocket streams.
- Complex state machines.
If you use React Query and your Sagas do nothing, you do not need them.
There is a third way: Unification. RTK Query and Redux allow you to keep everything in one store. This gives you one single snapshot of your entire app. This makes debugging, logging out, and offline persistence much easier.
Choose your path based on your needs:
- React Query + Zustand: Best for small teams needing low complexity.
- Redux + Sagas: Best for high-concurrency domains like trading apps.
- RTK Only: Best for large enterprise teams needing a single source of truth.
Before you pick a tool, ask if the state needs to live on the client at all. Server Components are moving much of this logic back to the server.
Find out who owns the truth first. The tool will follow.