A simple and flexible authentication library
- Weekly Downloads
- 0
Trend data unavailable
- Bundle (gzip)
- 4.0 KB
- Updated
- Vulns
- 0
Comparison guide
Side-by-side NPM package comparison

Smallest Bundle
Lucia
4.0 KB gzipped
Most Popular
Next-auth
5.9M weekly downloads
Best Maintained
Next-auth
80/100 maintenance score
Highest Quality
Lucia
50/100 quality score
Overall Pick
Next-auth
Best all-around based on popularity, size, maintenance & quality
A simple and flexible authentication library
Trend data unavailable
Authentication for Next.js
Choosing between Lucia and Next-auth? 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.
Next-auth leads with 5.9M weekly downloads — roughly 5865070.0x more. Lucia has 0 weekly downloads. Higher download counts generally indicate broader community adoption and a larger ecosystem of tutorials, plugins, and support.
Lucia has the smallest gzipped bundle at 4.0 KB. Next-auth comes in at 81.6 KB. A smaller bundle size means faster page loads, which improves user experience and Core Web Vitals scores.
Next-auth has an overall health score of 79/100 (very good), with strong maintenance, security, popularity scores. Lucia has an overall health score of 43/100 (moderate), with strong security scores. Health scores are calculated from maintenance activity, code quality, security posture, popularity, and stability metrics.
Choose Lucia if you value minimal bundle footprint, strong security track record. Choose Next-auth if you value large community support, strong security track record.
Both Lucia and Next-auth are solid choices for JavaScript development. Next-auth has the edge in overall health score (79/100), 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.
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