Authentication and user management built for developers
Drop-in authentication and user management for React, Next.js, and the modern web.
The pre-built UI components handle every auth flow including MFA, magic links, and OAuth and they look good out of the box
TypeScript SDK is excellent — user object is typed and available in both server and client components in Next.js without extra setup
Organization support for B2B SaaS is built in — multi-tenant with roles and permissions without writing any of that infrastructure yourself
The developer dashboard makes impersonating users and inspecting sessions trivially easy, which saves hours when debugging user issues
Webhooks fire reliably for every user lifecycle event so syncing your own database with auth state is straightforward
You're renting your authentication — if Clerk has an outage or shuts down, your users cannot log in, period
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
The Clerk-specific components and hooks create significant coupling — switching to another auth provider requires touching every component that handles auth state
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
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