MobX vs Zustand
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
Open source · MIT
A JavaScript library that tracks state changes automatically and updates the parts of your UI that depend on t
Open source · MIT
A small React state-management library built on hooks, with no providers needed.
The short answer
Choose MobX if you need…
- Frontend developers building React apps with complex or frequently changing state
- Teams who want state logic kept outside UI components so it is easier to test
- Developers who prefer plain JavaScript assignment over action-dispatch boilerplate
- TypeScript projects that want typed reactive state
Choose Zustand if you need…
- React developers who want simpler shared state than Redux
- Apps that need state shared across many components without wrapping them in providers
- Projects that need to read or update state outside components via getState and setState
- Developers who want fine control over which state changes trigger re-renders
Side-by-side
| MobX | Zustand | |
|---|---|---|
| Type | Library | Library |
| Price | Free and open source | Free and open source |
| Licence | MIT | MIT |
| GitHub stars | 28.2k | 58.9k |
| Setup difficulty | Intermediate | Beginner |
| How you get it | Install with a package manager | Install with a package manager |
| Main language | TypeScript | TypeScript |
| Last code update | 5 days ago | 15 days ago |
What each one is
MobX
MobX is a JavaScript and TypeScript library for managing application state. You mark data as observable, and it automatically records which parts of your code read that data, so only the dependent computations or UI components re-run when a value changes. The README says it is used with React through the mobx-react-lite package and that it is not tied to any UI framework.
Zustand
Zustand lets React apps keep shared state in a store that components read through a hook. Components subscribe to just the pieces they select and re-render only when those pieces change. The README says it needs no context providers and has a small API, and it can also be used without React.
Best for
MobX
- Frontend developers building React apps with complex or frequently changing state
- Teams who want state logic kept outside UI components so it is easier to test
- Developers who prefer plain JavaScript assignment over action-dispatch boilerplate
- TypeScript projects that want typed reactive state
Zustand
- React developers who want simpler shared state than Redux
- Apps that need state shared across many components without wrapping them in providers
- Projects that need to read or update state outside components via getState and setState
- Developers who want fine control over which state changes trigger re-renders
Strengths
MobX
- Updates are tracked automatically at runtime, so developers do not write manual memoization or selectors according to the README
- State can be changed with normal JavaScript assignment
- Independent of any UI framework, which makes state code portable and testable
Zustand
- Small, simple API based on hooks, with no providers required
- Components re-render only when the selected state they read changes
- Works with async actions and can be used outside React
Not ideal for
MobX
- Beginners who want a minimal first project, since the reactivity model takes time to learn
- Projects with very simple state that a plain useState hook or a few variables already handle
- Teams that want a framework-specific, opinionated structure, because the README describes MobX as unopinionated
Zustand
- Teams that require Redux's conventions, tooling, and strict structure, since the README describes zustand as un-opinionated
- Projects not using React or JavaScript, since the README focuses on JavaScript and React usage and the vanilla core is only a secondary option
- Adding state inside React Server Components, which the README explicitly advises against because it can cause bugs and privacy issues
Trade-offs
MobX
- The automatic tracking model is a concept new users must learn before it feels natural
- The README excerpt is truncated, so details on advanced APIs and edge cases are not verified here
- Its value depends on how much state complexity the project has; simple apps may not need it
Zustand
- The README says to set state immutably and be careful when replacing state, which takes care to get right
- Some patterns, such as fetching everything or using custom equality, can cause extra re-renders or require extra setup
- Documentation for the migration to v5 and TypeScript usage is referenced but not included in the truncated README
Getting started
Frequently asked questions
What is the difference between MobX and Zustand?
MobX: A JavaScript library that tracks state changes automatically and updates the parts of your UI that depend on t. Zustand: A small React state-management library built on hooks, with no providers needed. MobX suits frontend developers building react apps with complex or frequently changing state, while Zustand suits react developers who want simpler shared state than redux.
Are MobX and Zustand free?
MobX: Free and open source. Zustand: Free and open source.
Which is easier to set up, MobX or Zustand?
Zustand is easier to get started with (rated beginner); MobX is rated intermediate and usually needs more setup.
Is MobX or Zustand more popular?
Zustand has more GitHub stars (58.9k) than MobX (28.2k). Popularity isn't the same as fit — check which one matches your use case above.
What are other alternatives to MobX and Zustand?
Other options people compare them with include Redux, Jotai, Valtio, TanStack Table, TanStack Router.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.