Clerk vs Lucia

At a Glance

Clerk

Lucia

Clerk

Lucia

No features listed.

Clerk

Pros

The pre-built UI components handle every auth flow including MFA, magic links, and OAuth and they look good out of the box+176
TypeScript SDK is excellent — user object is typed and available in both server and client components in Next.js without extra setup+158
Organization support for B2B SaaS is built in — multi-tenant with roles and permissions without writing any of that infrastructure yourself+143
The developer dashboard makes impersonating users and inspecting sessions trivially easy, which saves hours when debugging user issues+127
Webhooks fire reliably for every user lifecycle event so syncing your own database with auth state is straightforward+108

Authentication

Clerk vs Auth0

Authentication

Clerk vs Auth0 vs WorkOS

Authentication

WorkOS vs Clerk

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Cons

You're renting your authentication — if Clerk has an outage or shuts down, your users cannot log in, period+178
Free tier is 10,000 MAU and then it jumps to $25/mo — reasonable for real products but expensive if you're experimenting or have a high-churn user base+162
The Clerk-specific components and hooks create significant coupling — switching to another auth provider requires touching every component that handles auth state+134
Custom domain for the hosted auth pages requires a paid plan, so on the free tier users see clerk.accounts.dev in the URL which looks unprofessional+109

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