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Auth0 vs Clerk
Comparing two authentication platforms on pricing, features, free tier, and trade-offs.
Quick summary
Auth0 — Identity platform for developers. Auth0 is an enterprise-grade identity platform offering authentication, authorization, and SSO.
Clerk — Authentication and user management. Clerk provides drop-in authentication, user management, and organizations with pre-built UI components.
Feature comparison
| Feature | Auth0 | Clerk |
|---|---|---|
| Pricing model | Freemium | Freemium |
| Starting price | $35/mo | $25/mo |
| Free tier | Yes | Yes |
| Open source | No | No |
| MFA | Yes | Yes |
| SAML/SSO | Yes | Yes |
| Free Tier | 7.5k MAU | 10k MAU |
| Self-hosted | No | No |
| Pre-built UI | Yes | Yes |
| Social Login | Yes | Yes |
| Organizations | Yes | Yes |
Auth0
Identity platform for developers
Pros
- Enterprise-ready
- Deep customization
- Acquired by Okta
Cons
- Expensive at scale
- Complex dashboard
- Free tier reduced over time
Clerk
Authentication and user management
Pros
- Beautiful pre-built components
- Organizations and B2B features
- Great Next.js integration
Cons
- Vendor lock-in on auth layer
- Gets expensive at scale
Which should you choose?
Choose Auth0 if a free tier is important for your stage. Choose Clerk if a free tier is important for your stage.
Frequently asked questions
Which is better, Auth0 or Clerk?
There is no universal “better.” For most teams, Clerk is the safer default because Clerk has a larger community and more third-party integrations, which often translates to better long-term support. For edge cases, the comparison table above highlights where each tool wins.
Is Auth0 cheaper than Clerk?
Auth0 starts at $35/mo, while Clerk starts at $25/mo. Exact costs depend on usage — check both vendors' calculators before committing.
Can I migrate from Auth0 to Clerk?
Migration difficulty depends on how deeply Auth0-specific features (APIs, SDK conventions, data schemas) are baked into your app. Most authentication migrations take days to weeks. Both vendors typically publish migration guides — check their docs.
Is Auth0 or Clerk open source?
No — both Auth0 and Clerk are proprietary managed services. If open source is a requirement, see our alternatives pages.
Does Auth0 or Clerk have a free tier?
Both Auth0 and Clerk offer a free tier.
Which is best for startups and indie hackers?
Startups usually optimize for the lowest friction to ship and the cheapest possible free tier. The one with the most generous free tier here is Clerk. For production workloads, revisit the trade-offs in the feature table above.