Auth0 vs Lucia

At a Glance

Auth0

Lucia

Auth0

Lucia

No features listed.

Auth0

Pros

Battle-tested enterprise auth with every compliance certification you'd need to close enterprise deals (SOC2, HIPAA, etc.)+163
The rules and actions pipeline lets you add custom logic to every auth step — useful for things like provisioning users in your database on first login+141
Every social provider, SAML IdP, and enterprise connection you could need is supported and well documented+128
Organizations feature handles multi-tenancy with per-org branding and connection settings which is essential for B2B+117

Cons

Pricing is confusing and the free tier limit of 7,500 MAU sounds generous until you hit it and face a $23/mo minimum with rapid escalation at scale

Authentication

Clerk vs Auth0

Authentication

Clerk vs Auth0 vs WorkOS

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Lucia

Pros

Extremely lightweight and gives you full control over sessions and auth logic without any magic happening behind the scenes+148
Framework agnostic — works with SvelteKit, Astro, Nuxt, and vanilla Node.js equally well with the same core logic+134
You can audit every line of code since it's open source and the codebase is small enough to actually read+109
No external service dependency means auth works as long as your own server works — no third-party SLA to worry about+96

Cons

More boilerplate required than hosted solutions — you're responsible for building password reset, email verification, and MFA yourself+142
Documentation is good but not comprehensive — complex scenarios like organization-based access control require figuring things out yourself+118
No prebuilt UI components so the visual auth flow is entirely your problem to design and build+87
Smaller community means fewer answers on Stack Overflow and Google — you'll spend more time in GitHub Discussions+73