Bvs

Better Auth vs NextAuth.js (Auth.js)

Comparing two authentication platforms on pricing, features, free tier, and trade-offs.

By Bilal Almukhtar Edited by Sofia DraganovLast updated April 20, 2026

Quick summary

Better Auth — The most comprehensive authentication library. Better Auth is a framework-agnostic, open-source authentication library for TypeScript with built-in plugins.

NextAuth.js (Auth.js) — Authentication for the web. Auth.js (formerly NextAuth) is a free open-source authentication library for Next.js and other frameworks.

Feature comparison

Feature	Better Auth	NextAuth.js (Auth.js)
Pricing model	Free	Free
Starting price	Free	Free
Free tier	Yes	Yes
Open source	Yes	Yes
MFA	Yes	No
SAML/SSO	Yes	No
Free Tier	Self-hosted	Self-hosted
Self-hosted	Yes	Yes
Pre-built UI	No	No
Social Login	Yes	Yes
Organizations	Yes	No

Better Auth

The most comprehensive authentication library

Pros

Fully open source
No vendor lock-in
TypeScript-first

Cons

You manage the infrastructure
No hosted option

Visit Better Auth →

NextAuth.js (Auth.js)

Authentication for the web

Pros

Free and open source
Huge provider catalog
Self-hosted

Cons

No built-in MFA/orgs
You build your own UI
Docs can be rough

Visit NextAuth.js (Auth.js) →

Which should you choose?

Choose Better Auth if you value open source and want the option to self-host, and a free tier is important for your stage. Choose NextAuth.js (Auth.js) if you value open source and want the option to self-host, and a free tier is important for your stage.

Frequently asked questions

Which is better, Better Auth or NextAuth.js (Auth.js)?

There is no universal “better.” For most teams, NextAuth.js (Auth.js) is the safer default because NextAuth.js (Auth.js) has a larger community and more third-party integrations, which often translates to better long-term support. For edge cases, the comparison table above highlights where each tool wins.

Is Better Auth cheaper than NextAuth.js (Auth.js)?

Better Auth starts at Free, while NextAuth.js (Auth.js) starts at Free. Exact costs depend on usage — check both vendors' calculators before committing.

Can I migrate from Better Auth to NextAuth.js (Auth.js)?

Migration difficulty depends on how deeply Better Auth-specific features (APIs, SDK conventions, data schemas) are baked into your app. Most authentication migrations take days to weeks. Both vendors typically publish migration guides — check their docs.

Is Better Auth or NextAuth.js (Auth.js) open source?

Yes, both Better Auth and NextAuth.js (Auth.js) are open source and can be self-hosted.

Does Better Auth or NextAuth.js (Auth.js) have a free tier?

Both Better Auth and NextAuth.js (Auth.js) offer a free tier.

Which is best for startups and indie hackers?

Startups usually optimize for the lowest friction to ship and the cheapest possible free tier. The one with the most generous free tier here is NextAuth.js (Auth.js). For production workloads, revisit the trade-offs in the feature table above.

More Authentication comparisons

All Better Auth alternatives →All NextAuth.js (Auth.js) alternatives →