Lucia vs Better Auth, which auth service wins for your brief, in 2026

Two auth services, side by side. Lucia is lightweight typescript auth library. library-not-framework, minimal opinions, byo everything. Better Auth is newer typescript-first oss auth library. designed as the modern auth.js alternative. The verdict, the criteria, and the honest take below.

ALL AUTH COMPARISONS →

Verdict in one paragraph

Library vs slightly-larger-library. Lucia is the minimalist primitive-only auth library, sessions, BYO everything else. Better Auth is the more opinionated alternative with social logins, MFA, organisations baked in. For teams that want auth as composable primitives, Lucia. For teams that want a library that solves more out of the box, Better Auth.

Score across the criteria: Lucia 2 · Better Auth 3 · ties 1

Side by side

Lucia
Better Auth
Category
Library / OSS
Library / OSS
Language
TypeScript
TypeScript
Pricing
Open source
Open source
License
MIT
MIT
Created
2021
2024
GitHub stars
9.7k
18.4k
HIPAA
No
No
SSO/SAML
Limited
Yes

Decision criteria

  • Which is more minimal?

    Lucia

    Lucia is a session-management primitive. Better Auth is a more complete auth library.

  • Which has more out of the box?

    Better Auth

    Social logins, MFA, organisations, plugins, Better Auth ships features Lucia does not.

  • Which is more flexible?

    Lucia

    Lucia is library-not-framework. You compose your auth rather than configuring it.

  • Which is faster to ship?

    Better Auth

    Better Auth's opinionated defaults get you to a complete auth flow faster.

  • Which has the better TypeScript story?

    Tie

    Both are TS-first and well-typed. Pick by which abstraction level you prefer.

  • Which has the better trajectory?

    Better Auth

    Better Auth has the bigger community momentum in 2026.

What Lucia is best for

  • Teams that want auth as a library, not a service
  • Apps with non-standard requirements (custom session shapes, custom hashing)
  • TypeScript developers who prefer composing primitives

Read the full Lucia entry: /authentication/lucia/

What Better Auth is best for

  • Greenfield TypeScript projects that want a modern OSS auth library
  • Teams comparing against Auth.js and finding the abstractions awkward
  • Multi-tenant briefs where Auth.js feels constrained

Read the full Better Auth entry: /authentication/better-auth/

The auth choice is the easy half, your migration is the hard one

The hard half is migrating user accounts off the old stack without breaking sessions, getting your team adopted, and surviving the SOC2 / HIPAA audit conversations. The 30-min call covers all three for your specific project, describe your stack, your scale, your compliance constraints; I tell you whether Lucia or Better Auth (or something else) is your fit.