PEAKIQ

Posted on Apr 24 • Originally published at peakiq.in

Zustand vs Redux: Which React State Manager Should You Use in 2026?

#react #zustand #statemanagement #javascript

Originally published on PEAKIQ

What Is Redux?

Redux is a predictable state container for JavaScript apps. Originally inspired by the Elm architecture and Flux pattern, it has been the de-facto standard for complex React applications since 2015.

Today, Redux Toolkit (RTK) is the officially recommended way to write Redux logic — drastically reducing the boilerplate that gave Redux its infamous reputation.

npm install @reduxjs/toolkit react-redux

A minimal Redux Toolkit setup:

// store/counterSlice.ts
import { createSlice } from '@reduxjs/toolkit';

const counterSlice = createSlice({
  name: 'counter',
  initialState: { value: 0 },
  reducers: {
    increment: (state) => { state.value += 1; },
    decrement: (state) => { state.value -= 1; },
  },
});

export const { increment, decrement } = counterSlice.actions;
export default counterSlice.reducer;

// store/index.ts
import { configureStore } from '@reduxjs/toolkit';
import counterReducer from './counterSlice';

export const store = configureStore({
  reducer: { counter: counterReducer },
});

export type RootState = ReturnType<typeof store.getState>;
export type AppDispatch = typeof store.dispatch;

// Counter.tsx
import { useSelector, useDispatch } from 'react-redux';
import { increment, decrement } from './store/counterSlice';
import type { RootState } from './store';

export function Counter() {
  const count = useSelector((state: RootState) => state.counter.value);
  const dispatch = useDispatch();

  return (
    <div>
      <button onClick={() => dispatch(decrement())}>-</button>
      <span>{count}</span>
      <button onClick={() => dispatch(increment())}>+</button>
    </div>
  );
}

What Is Zustand?

Zustand (German for "state") is a small, fast, and scalable state management library built by the creators of Jotai and React Spring. It uses a simplified flux-inspired model without the ceremony.

npm install zustand

The same counter in Zustand:

// store/useCounterStore.ts
import { create } from 'zustand';

interface CounterState {
  value: number;
  increment: () => void;
  decrement: () => void;
}

export const useCounterStore = create<CounterState>((set) => ({
  value: 0,
  increment: () => set((state) => ({ value: state.value + 1 })),
  decrement: () => set((state) => ({ value: state.value - 1 })),
}));

// Counter.tsx
import { useCounterStore } from './store/useCounterStore';

export function Counter() {
  const { value, increment, decrement } = useCounterStore();

  return (
    <div>
      <button onClick={decrement}>-</button>
      <span>{value}</span>
      <button onClick={increment}>+</button>
    </div>
  );
}

No Provider. No boilerplate. Just a hook.

Head-to-Head Comparison

1. Boilerplate & Setup

	Redux Toolkit	Zustand
Setup complexity	Medium (store + slices + Provider)	Minimal (one `create` call)
Files needed	3–5 per feature	1 per store
Provider required	Yes	No
TypeScript support	Excellent	Excellent

Winner: Zustand — dramatically less ceremony for small-to-medium apps.

2. Learning Curve

Redux carries conceptual overhead: actions, reducers, selectors, middleware, and the Provider pattern. Redux Toolkit simplifies this significantly, but the mental model is still heavier than Zustand's.

Zustand's entire API fits on a single page. If you know React hooks, you're already 80% there.

Winner: Zustand for beginners; Redux for teams already comfortable with the pattern.

3. DevTools & Debugging

Redux's Redux DevTools Extension is one of the best debugging tools in frontend development. It gives you:

Time-travel debugging
Action history replay
State diff viewer
Persist & import state snapshots

Zustand supports DevTools via middleware:

import { create } from 'zustand';
import { devtools } from 'zustand/middleware';

const useStore = create(devtools((set) => ({
  value: 0,
  increment: () => set((state) => ({ value: state.value + 1 })),
})));

It works, but the experience isn't as polished. Action names are less granular and the history is harder to trace.

Winner: Redux — this is one of its biggest advantages.

4. Performance

Both libraries are highly performant, but their models differ:

Redux uses a single global store and relies on useSelector with reference equality checks to prevent unnecessary re-renders.
Zustand lets you subscribe to slices of state with fine-grained selectors, reducing re-renders with less boilerplate.

// Zustand: only re-renders when `value` changes
const value = useCounterStore((state) => state.value);

For most apps, the difference is negligible. At large scale with thousands of components, Redux Toolkit with createSelector (via reselect) gives more explicit optimization control.

Winner: Tie — both are fast. Zustand is easier to use performantly by default.

5. Middleware & Side Effects

Redux has a mature middleware ecosystem:

Redux Thunk (built into RTK) for async actions
Redux Saga for complex side-effect workflows
RTK Query for data fetching and caching

Zustand handles async naturally inside its actions:

const useUserStore = create<UserState>((set) => ({
  user: null,
  loading: false,
  fetchUser: async (id: string) => {
    set({ loading: true });
    const user = await api.getUser(id);
    set({ user, loading: false });
  },
}));

For data fetching, pairing Zustand with TanStack Query (React Query) is a popular and powerful combo.

Winner: Redux for complex async orchestration; Zustand + TanStack Query as a lean modern alternative.

6. Scalability

Redux enforces structure through its architecture — one store, explicit actions, and pure reducers. In large teams, this makes state changes predictable and traceable.

Zustand is more free-form. You can have multiple independent stores, colocated with features:

src/
  features/
    auth/
      useAuthStore.ts
    cart/
      useCartStore.ts

This works great for medium-sized apps but requires team discipline at scale. Without conventions, Zustand stores can drift in style across a large codebase.

Winner: Redux for large teams; Zustand for small-to-mid teams or solo projects.

7. Bundle Size

Library	Bundle Size (minzipped)
Zustand	~1.1 KB
Redux Toolkit	~11 KB
react-redux	~3 KB
RTK Total	~14 KB

Winner: Zustand — nearly 13x smaller.

When to Choose Zustand

✅ Small-to-medium projects
✅ You want minimal boilerplate
✅ Solo developers or small teams
✅ Fast prototyping and MVPs
✅ Time-travel debugging isn't a hard requirement
✅ When combined with TanStack Query for server state

When to Choose Redux Toolkit

✅ Large-scale enterprise applications
✅ Teams that need strict, predictable patterns
✅ Complex async workflows (Redux Saga)
✅ You need powerful DevTools and time-travel debugging
✅ Projects using RTK Query for the API layer
✅ Codebases with many contributors needing enforced conventions

The Hybrid Approach

Many modern projects skip Redux entirely and use:

TanStack Query for server state (fetching, caching, synchronization)
Zustand for client/UI state (modals, themes, user preferences)

// Server state: TanStack Query
const { data: user } = useQuery({
  queryKey: ['user', id],
  queryFn: () => fetchUser(id),
});

// Client state: Zustand
const { isModalOpen, openModal } = useUIStore();

This separation of concerns is clean, maintainable, and covers the vast majority of real-world use cases.

Summary Table

Criteria	Pick
Simple app, fast setup	Zustand
Large team, strict patterns	Redux Toolkit
Best debugging experience	Redux Toolkit
Smallest bundle size	Zustand
Complex async / saga workflows	Redux Toolkit
Colocated feature stores	Zustand
Data fetching + caching	RTK Query or TanStack Query

Conclusion

There's no universally "better" library — it depends on your context.

If you're starting a new project in 2026 and aren't building a large-scale enterprise app, Zustand is likely the better default choice. It's simpler, smaller, and fast enough for the vast majority of use cases.

If you're in a large organization, already invested in Redux, or need the unmatched debugging power of Redux DevTools — stick with Redux Toolkit.

The good news? Both are mature, well-maintained libraries. And migrating between them is less painful than it used to be.

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