Mirage JS
Client-side mock API library for JavaScript apps that lets frontend teams build, test and share complete applications without any backend.
Our Verdict
Still a nice DX for frontend-only flows, but MSW has largely eaten its lunch for new projects.
Pros
- Ship frontend without waiting on backend APIs
- Models, factories and serializers feel like Rails
- Runs entirely in the browser for fast iteration
- Great for demos and offline development
Cons
- Bundled into app builds, easy to ship by mistake
- Development has slowed significantly
- MSW covers similar ground more flexibly
- Extra abstraction some teams never use
When to Use Mirage JS
Good fit if you need
- Frontend development with mocked backend API responses
- Test React/Vue apps without any real backend running
- Share complete app prototypes without backend dependency
- Reproducible API states for deterministic UI tests
Pricing
Price wrong?Mirage JS Pricing
- Pricing Model
- free
- Free Tier
- Yes
- Entry Price
- —
- Enterprise Available
- No
- Transparency Score
- —
Beta — estimates may differ from actual pricing
Estimated Monthly Cost
$25
Estimated Annual Cost
$300
Estimates are approximate and may not reflect current pricing. Always check the official pricing page.
Project Health
Health Score
10
8 months
132d
213
109d
MIT
Last checked: 2026-04-21
Lock-in Assessment
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