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
Best for: Frontend teams prototyping UIs before backend endpoints exist
Not for: New projects that should adopt MSW for broader mocking coverage
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
Lock-in Assessment
High 5/5
Lock-in Score 5/5
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
1,000
1001K10K100K1M
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
F
Health Score
5.5k 175
Bus Factor
10
Last Commit
8 months
Release Freq
132d
Open Issues
213
Issue Response
109d
License
MIT
Last checked: 2026-04-21
Community Discussion
Comments powered by Giscus (GitHub Discussions). You need a GitHub account to comment.