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Msw vs Nock

Side-by-side NPM package comparison

msw

Extremely Popular

Version 2.12.10

85
Excellent

Seamless REST/GraphQL API mocking library for browser and Node.js.

Weekly Downloads
11.5M
↑23%
Bundle (gzip)
1.4 MB
Updated
Vulns
0

Health Score Breakdown

Maintenance
100
Popularity
100
Quality
50
Security
100
Stability
70

nock

Very Popular

Version 14.0.11

85
Excellent

HTTP server mocking and expectations library for Node.js

Weekly Downloads
6.0M
↑15%
Bundle (gzip)
54.1 KB
Updated
Vulns
0

Health Score Breakdown

Maintenance
100
Popularity
100
Quality
50
Security
100
Stability
70

Choosing between Msw and Nock? Here's a data-driven comparison based on real npm data — downloads, bundle size, health scores, and more — to help you decide which package fits your project best.

Downloads & Popularity

Msw leads with 11.5M weekly downloads — roughly 1.9x more. Nock has 6.0M weekly downloads. Higher download counts generally indicate broader community adoption and a larger ecosystem of tutorials, plugins, and support.

Bundle Size

Nock has the smallest gzipped bundle at 54.1 KB. Msw comes in at 1.4 MB. A smaller bundle size means faster page loads, which improves user experience and Core Web Vitals scores.

Health Score Comparison

Msw has an overall health score of 85/100 (very good), with strong maintenance, security, popularity scores. Nock has an overall health score of 85/100 (very good), with strong maintenance, security, popularity scores. Health scores are calculated from maintenance activity, code quality, security posture, popularity, and stability metrics.

When to Choose Each

Choose Msw if you value massive community and ecosystem, actively maintained, strong security track record. Choose Nock if you value large community support, actively maintained, strong security track record.

Our Verdict

Both Msw and Nock are solid choices for JavaScript development. Msw has the edge in overall health score (85/100), while each package brings unique strengths to the table. Evaluate them based on your project's priorities — whether that's community size, bundle efficiency, or maintenance activity — and choose the one that aligns best with your requirements.

Frequently Asked Questions

Is msw better than nock?
It depends on your needs. Msw has a health score of 85/100 while Nock scores 85/100. Msw has more weekly downloads (11.5M), suggesting broader adoption. Consider your specific requirements — bundle size, community support, and feature set — to decide which is the better fit.
Which has a smaller bundle size, msw or nock?
Nock has the smaller gzipped bundle at 54.1 KB. A smaller bundle means faster load times for your users, which can positively impact SEO and user experience.
How many developers use msw vs nock?
Based on npm download statistics, Msw has approximately 11.5M weekly downloads and Nock has approximately 6.0M weekly downloads. These numbers reflect package installations, not unique developers, but they indicate relative adoption levels.
Which is better maintained, msw or nock?
Msw currently has the higher overall health score at 85/100. Msw has a maintenance score of 100/100 and Nock scores 100/100 on maintenance.