C
Clerk
★ FeaturedAuthentication in under 10 minutes — 10,000 MAU free, passkeys and B2B organizations included.
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About Clerk
Clerk is a complete user authentication and management platform for React and Next.js. Drop-in UI components for sign-in, sign-up, and user profiles that work out of the box.
**Time to working authentication:** Clerk: under 10 minutes. SendGrid: 22 minutes. NextAuth: 4-8 hours.
**Feature comparison vs Auth0 and NextAuth:**
| Feature | Clerk Free | Auth0 Free | NextAuth (self) |
|---------|-----------|-----------|----------------|
| MAU limit | 10,000 | 7,500 | Unlimited |
| UI components | Included | Extra cost | Minimal |
| Passkeys | Included | Paid | Manual |
| Organizations (B2B) | Included | Paid | Manual |
Passkeys are included free in Clerk. Auth0 charges extra. Implementing WebAuthn from scratch takes 2-3 weeks.
Key Features
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Pre-built components: SignIn, SignUp, UserButton, UserProfile themed to match your brand
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Organizations: B2B multi-tenancy with invitations, roles, and permissions built-in
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Multi-factor auth: TOTP, SMS, backup codes, and hardware keys all included free
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Passkeys: WebAuthn passkey registration and login — one-click enable in the dashboard
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Webhooks: user.created, session.created, and 20+ events for syncing to your database
Pros
- ✓Working auth in under 10 minutes — fastest path to production-ready authentication
- ✓10,000 MAU free vs Auth0 7,500
- ✓Passkey support included free while Auth0 charges extra
- ✓Organizations and B2B multi-tenancy built-in without extra plans
- ✓Pre-built UI components that look professional with zero CSS required
Cons
- ✗Less suitable for non-React frameworks
- ✗User data stored on Clerk servers — not suitable for strict data sovereignty
- ✗Pricing scales with MAU — expensive for consumer apps with large free user bases
Who is using Clerk?
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Next.js and React developers who want auth done in an afternoon
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SaaS founders who need B2B multi-tenancy built-in
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Developers who want passkey support without WebAuthn complexity
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Startups who want to never think about auth again
Use Cases
- →Adding Google and GitHub social login to a Next.js SaaS in under 15 minutes
- →Building a B2B SaaS where each organization has separate user management
- →Implementing passkey authentication without WebAuthn complexity
- →Replacing Auth0 to get a higher free MAU limit and better React component integration
Pricing
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Free : $0/mo — 10,000 MAU, All auth methods, MFA, Organizations, Community support
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Pro : $25/mo — Unlimited MAU (pay per user above 10K), Advanced org features, Priority support, Custom SSO
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Enterprise : Custom — SAML SSO, Custom domains, SLA, Dedicated support
Pricing details may not be up to date. For the most accurate and current pricing, refer to the official website.
What Makes Clerk Unique?
The only authentication platform with working production auth in under 10 minutes, 10,000 MAU free (higher than Auth0), passkeys and B2B organizations included without enterprise plans.
How We Rated It
Setup time measured by a developer unfamiliar with Clerk building a Next.js application. Feature comparison based on published documentation as of July 2025.
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Accuracy and Reliability 4.7/5
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Ease of Use 4.9/5
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Functionality and Features 4.7/5
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Performance and Speed 4.8/5
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Customer Support 4.5/5
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Value for Money 4.6/5
AI summary
Authentication in under 10 minutes — 10,000 MAU free, passkeys and B2B organizations included.