Version 5.8.4
0
85
ExcellentFast and low overhead web framework, for Node.js
- Weekly Downloads
- 5.6M
↑21%
- Bundle (gzip)
- 815.4 KB
- Updated
- Vulns
- 0
Health Score Breakdown
Maintenance
100
Popularity
100
Quality
50
Security
100
Stability
70
Fastify vs Nestjs
Side-by-side NPM package comparison
Quick Verdict
Fastify leads across all categories in this comparison. Check the detailed metrics below to see how each package performs for your specific needs.
nestjs
Niche
Version 0.0.1
0
51
Fairweb framework
- Weekly Downloads
- 9.7K
↑38%
- Bundle (gzip)
- 0 B
- Updated
- Vulns
- 0
Health Score Breakdown
Maintenance
20
Popularity
50
Quality
50
Security
100
Stability
70
Choosing between Fastify and Nestjs? 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
Fastify leads with 5.6M weekly downloads — roughly 578.2x more. Nestjs has 9.7K weekly downloads. Higher download counts generally indicate broader community adoption and a larger ecosystem of tutorials, plugins, and support.
Bundle Size
Nestjs has the smallest gzipped bundle at 0 B. Fastify comes in at 815.4 KB. A smaller bundle size means faster page loads, which improves user experience and Core Web Vitals scores.
Health Score Comparison
Fastify has an overall health score of 85/100 (very good), with strong maintenance, security, popularity scores. Nestjs has an overall health score of 51/100 (moderate), with strong security scores. Health scores are calculated from maintenance activity, code quality, security posture, popularity, and stability metrics.
When to Choose Each
Choose Fastify if you value large community support, actively maintained, strong security track record. Choose Nestjs if you value strong security track record.
Our Verdict
Both Fastify and Nestjs are solid choices for JavaScript development. Fastify 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 fastify better than nestjs?
- It depends on your needs. Fastify has a health score of 85/100 while Nestjs scores 51/100. Fastify has more weekly downloads (5.6M), 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, fastify or nestjs?
- Nestjs has the smaller gzipped bundle at 0 B. A smaller bundle means faster load times for your users, which can positively impact SEO and user experience.
- How many developers use fastify vs nestjs?
- Based on npm download statistics, Fastify has approximately 5.6M weekly downloads and Nestjs has approximately 9.7K weekly downloads. These numbers reflect package installations, not unique developers, but they indicate relative adoption levels.
- Which is better maintained, fastify or nestjs?
- Fastify currently has the higher overall health score at 85/100. Fastify has a maintenance score of 100/100 and Nestjs scores 20/100 on maintenance.
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The 2026 JavaScript Stack Cheatsheet
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