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Comparison guide
Bun vs Deno vs Nodejs
Side-by-side NPM package comparison
Quick Verdict
Smallest Bundle
Deno
3.3 KB gzipped
Most Popular
Bun
2.6M weekly downloads
Best Maintained
Bun
100/100 maintenance score
Highest Quality
Bun
80/100 quality score
Overall Pick
Bun
Best all-around based on popularity, size, maintenance & quality
deno
A modern runtime for JavaScript and TypeScript.
215.0K weekly downloads · 3.3 KB gzip · Health 82/100
0nodejs
2.4K weekly downloads · 0 B gzip · Health 55/100
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Choosing between Bun and Deno and Nodejs? 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
Bun leads with 2.6M weekly downloads — roughly 11.9x more. Deno has 215.0K weekly downloads. Nodejs has 2.4K weekly downloads. Higher download counts generally indicate broader community adoption and a larger ecosystem of tutorials, plugins, and support.
Bundle Size
Nodejs has the smallest gzipped bundle at 0 B. Deno comes in at 3.3 KB. Bun comes in at 5.9 KB. A smaller bundle size means faster page loads, which improves user experience and Core Web Vitals scores.
Health Score Comparison
Bun has an overall health score of 92/100 (excellent), with strong maintenance, quality, security, popularity scores. Deno has an overall health score of 82/100 (very good), with strong maintenance, quality, security, popularity scores. Nodejs has an overall health score of 55/100 (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 Bun if you value large community support, actively maintained, strong security track record. Choose Deno if you value minimal bundle footprint, strong security track record. Choose Nodejs if you value strong security track record.
Our Verdict
Both Bun and Deno and Nodejs are solid choices for JavaScript development. Bun has the edge in overall health score (92/100), 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 bun better than deno?
- It depends on your needs. Bun has a health score of 92/100 while Deno scores 82/100. Bun has more recorded weekly downloads (2.6M). Consider your specific requirements — bundle size, community support, and feature set — to decide which is the better fit.
- Which has a smaller bundle size, bun or deno?
- Deno has the smaller gzipped bundle at 3.3 KB. A smaller bundle means faster load times for your users, which can positively impact SEO and user experience.
- How many developers use bun vs deno?
- Bun has more recorded weekly downloads (2.6M). Download counts reflect package installations, not unique developers.
- Which is better maintained, bun or deno?
- Bun has a maintenance score of 100/100. Bun scores 100/100 and Deno scores 80/100 on maintenance.
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The 2026 JavaScript Stack Cheatsheet
One PDF: the best package for every category (ORMs, bundlers, auth, testing, state management). Used by 500+ devs. Free, updated monthly.