Auth0 vs Clerk.
Last verified 2026-05-06
When Auth0 wins
- Mature B2B Organizations model with deeper enterprise federation breadth
- Largest SDK and language coverage in CIAM
- Auth0 FGA brings Zanzibar-style fine-grained authorization without a separate vendor
- Compliance footprint includes FedRAMP High (via Okta), required for federal workloads
When Clerk wins
- Faster time-to-first-login (15 minutes vs hours)
- Tighter Next.js / React DX with default UI components
- Lower cost up to 100k MAU
- Conditional-UI passkeys on by default, typically higher adoption
- Transparent, predictable pricing through 100k MAU
Both win
- Both support WebAuthn passkeys natively
- Both support social login at scale
- Both have SOC 2 Type II
- Both support B2B Organizations
Pricing comparison
| MAU band | Auth0 | Clerk |
|---|---|---|
| 10,000 MAU | $240/mo | $25/mo |
| 100,000 MAU | $1,200/mo | $800/mo |
| 500,000 MAU | $4,500/mo | $2,800/mo |
| 1,000,000 MAU | $9,500/mo | $5,500/mo |
Side-by-side capability matrix
| Capability | Auth0 | Clerk |
|---|---|---|
| Password authentication | ✓ Yes | ✓ Yes |
| Social login | ✓ Yes | ✓ Yes |
| Magic links | ✓ Yes | ✓ Yes |
| SMS OTP | ✓ Yes | ✓ Yes |
| Email OTP | ✓ Yes | ✓ Yes |
| TOTP (authenticator app) | ✓ Yes | ✓ Yes |
| Push MFA | ✓ Yes | ✕ No |
| WebAuthn / passkeys | ✓ Yes | ✓ Yes |
| Biometric | ✓ Yes | ✓ Yes |
| Hardware security keys | ✓ Yes | ✓ Yes |
| SAML SSO | ✓ Yes | ✓ Yes |
| OIDC SSO | ✓ Yes | ✓ Yes |
| OAuth 2.0 SSO | ✓ Yes | ✓ Yes |
| Enterprise federation | ✓ Yes | ~ Partial |
| Passwordless-only flows | ✓ Yes | ✓ Yes |
| Adaptive MFA | ✓ Yes | ~ Partial |
| Step-up auth | ✓ Yes | ✓ Yes |
| Capability | Auth0 | Clerk |
|---|---|---|
| RBAC | ✓ Yes | ✓ Yes |
| ABAC | ~ Partial | ✕ No |
| ReBAC | ✕ No | ✕ No |
| FGA engine | ✓ Yes | ✕ No |
| API authorization | ✓ Yes | ✓ Yes |
| Fine-grained permissions | ✓ Yes | ~ Partial |
| Capability | Auth0 | Clerk |
|---|---|---|
| Self-service registration | ✓ Yes | ✓ Yes |
| Progressive profiling | ✓ Yes | ✓ Yes |
| Self-service account | ✓ Yes | ✓ Yes |
| Bulk user import | ✓ Yes | ✓ Yes |
| Admin user search | ✓ Yes | ✓ Yes |
| Custom user metadata | ✓ Yes | ✓ Yes |
| Organizations / tenants | ✓ Yes | ✓ Yes |
| Multi-tenancy | ✓ Yes | ✓ Yes |
| Capability | Auth0 | Clerk |
|---|---|---|
| REST API | ✓ Yes | ✓ Yes |
| GraphQL API | ✕ No | ✕ No |
| SDKs | 16 listed | 9 listed |
| CLI | ✓ Yes | ✓ Yes |
| Terraform provider | ✓ Yes | ✕ No |
| Local emulator | ✕ No | ✕ No |
| Extension model | Actions (Node.js serverless) | Webhooks + JWT templates |
| Capability | Auth0 | Clerk |
|---|---|---|
| Bot detection | ✓ Yes | ✓ Yes |
| Breached password detection | ✓ Yes | ✓ Yes |
| Brute-force protection | ✓ Yes | ✓ Yes |
| Anomaly detection | ✓ Yes | ~ Partial |
| Log streams | ✓ Yes | ~ Partial |
| Audit logs | ✓ Yes | ✓ Yes |
| GDPR data export | ✓ Yes | ✓ Yes |
| PII minimization | ~ Partial | ~ Partial |
| Post-quantum roadmap | ✕ No | ✕ No |
| Capability | Auth0 | Clerk |
|---|---|---|
| MCP support | ~ Partial | ✕ No |
| OAuth 2.1 | ✓ Yes | ✓ Yes |
| Dynamic client registration | ✓ Yes | ✕ No |
| Agent vs human token separation | ✕ No | ✕ No |
| Web Bot Auth | ✕ No | ✕ No |
| Capability | Auth0 | Clerk |
|---|---|---|
| SOC 2 Type II | ✓ Yes | ✓ Yes |
| ISO 27001 | ✓ Yes | ✕ No |
| ISO 27018 | ✓ Yes | ✕ No |
| HIPAA | ✓ Yes | ~ Partial |
| PCI DSS | Level 1 (with config) | ✕ No |
| GDPR | ✓ Yes | ✓ Yes |
| CCPA | ✓ Yes | ✓ Yes |
| FedRAMP | High (via Okta) | ✕ No |
| EU data residency | ✓ Yes | ✓ Yes |
| Capability | Auth0 | Clerk |
|---|---|---|
| Consent management | ~ Partial | ✕ No |
| Preference center | ~ Partial | ~ Partial |
| Purpose-specific consent | ✕ No | ✕ No |
| Integrates with CMPs | 2 listed | n/a |
FAQ
- Is Clerk a real Auth0 alternative for B2B SaaS?
- Yes for sub-100k MAU SaaS. Clerk's Organizations and B2B SSO reach feature parity for most B2B use cases. For complex enterprise federation with 50+ connections, Auth0 still leads.
- Which has better passkey adoption?
- In our cross-vendor data, Clerk customers see higher passkey adoption out of the box because conditional UI is on by default. Auth0 customers reach similar numbers when paired with an orchestration layer like Authsignal or Corbado, or when conditional UI is opted into manually.
- Which is cheaper at 500k MAU?
- Clerk, by a significant margin at standard tiers (roughly $2,500–$3,000/mo vs $4,000–$5,000/mo). The gap narrows above 1M MAU and depends heavily on Enterprise SSO connection counts and add-ons. Always confirm with both vendors at your scale.
- Can I migrate between them?
- Both support bulk user import with hash compatibility for common algorithms (bcrypt). Auth0 → Clerk migration is relatively low-friction for sub-100k MAU. Clerk → Auth0 is similarly tractable. The harder lift in either direction is rewriting Auth0 Actions or Clerk webhooks against the new vendor's hooks model.
This comparison is auto-generated from the underlying capability matrix and pricing data on each vendor's profile, with editorial verdicts (the "When Auth0 wins" / "When Clerk wins" lists below) reviewed by a maintainer.