Auth & Backend · side by side
Clerk vs Lucia
Compare Clerk, Lucia by active-user allowances, social login, MFA, SSO, organizations and audit logs.
Auth & Backend pricing calculator
These providers bill in different units. Each estimate uses its own workload; there is no same-volume price winner.
Clerk
25K
Lucia
1
Clerk
$25 / mo
Pro · 25K MAUs
Lucia
Custom / not listed
Custom / unlisted usage pricing · 1 servers
Listed USD plan fees and tracked usage only. Unlisted compute, transfer, extras, taxes and contract terms are excluded. Custom or unsupported plan usage is not estimated.
Auth & Backend overview & pricing
| Auth & Backend | Clerk | Lucia |
|---|---|---|
| Provider | Clerk | Open source |
| Billing unit | MAUs | servers |
| Plan at selected usage | Pro | Custom / unlisted usage pricing |
| Monthly estimate | $25/mo | Custom / not listed |
| Workload | 25K MAUs | 1 servers |
| Free access | 10,000 MAUs | Free, open source |
| Published plans | Hobby, Pro, Business, Enterprise | Not listed |
| Prices checked | 2026-10-08 | Not listed |
Provider
- Clerk
- Clerk
- Lucia
- Open source
Billing unit
- Clerk
- MAUs
- Lucia
- servers
Plan at selected usage
- Clerk
- Pro
- Lucia
- Custom / unlisted usage pricing
Monthly estimate
- Clerk
- $25/mo
- Lucia
- Custom / not listed
Workload
- Clerk
- 25K MAUs
- Lucia
- 1 servers
Free access
- Clerk
- 10,000 MAUs
- Lucia
- Free, open source
Published plans
- Clerk
- Hobby, Pro, Business, Enterprise
- Lucia
- Not listed
Prices checked
- Clerk
- 2026-10-08
- Lucia
- Not listed
Auth & Backend monthly cost
Clerk: $25Lucia: Not priced
Different workloads, separate estimates
Check how each provider defines an active user and separates consumer identity from enterprise organizations. SAML, MFA, custom domains and audit logs can be gated behind higher plans. A backend platform can also charge separately for storage, functions and traffic.
Auth & Backend feature comparison
| Auth & Backend | Clerk | Lucia |
|---|---|---|
| Base price | $25/mo, $20/mo billed annually | Not listed |
| Included applications | Unlimited | Not listed |
| Included MRUs | 50,000 MRUs included per app; 50,001 - 100,000 $0.02/mo each; 100,001 - 1,000,000 $0.018/mo each; 1,000,001 - 10,000,000 | Not listed |
| Dashboard seats | Up to 3 | Not listed |
| Remove Clerk branding | Not listed | |
| Social connections | Unlimited | Not listed |
| Usernames | Not listed | |
| Passwords | Not listed | |
| Email codes | Not listed | |
| Email links | Not listed | |
| SMS codes | Per SMS fees apply | Not listed |
| Sign in tokens | Not listed | |
| Web3 wallets | Not listed | |
| Automatic account linking | Not listed | |
| User metadata | Not listed | |
| Webhooks for data sync | Not listed | |
| Passkeys | Not listed | |
| Biometric sign-in | Not listed | |
| Custom password requirements | Not listed | |
| Custom email templates | Not listed | |
| Multifactor authentication (MFA) | Not listed | |
| SSO connections | 1 connection included per app; 2 - 15 $75/mo each; 16 - 100 $60/mo each; 101+ Contact us | Not listed |
| Directory Sync connections | 1 connection included per app; 2 - 15 $75/mo each; 16 - 100 $60/mo each; 101+ Contact us | Not listed |
| API Keys | Creations: 1,000 Included per month, 1,001+ $0.001 each; Verifications: 100,000 Included per month, 100,001+ $0.00001 ea | Not listed |
| M2M Tokens | Creations: 2,500 Included per month, 2,501+ $0.001 each; Verifications: 100,000 Included per month, 100,001+ $0.00001 ea | Not listed |
| Account lockout / brute-force protection | Not listed | |
| Bot protection | Not listed | |
| Block email subaddresses | Not listed | |
| Block disposable email addresses | Not listed | |
| Require invitations | Not listed | |
| User bans | Not listed | |
| Allowlist / blocklist | Not listed | |
| Custom session tokens | Not listed | |
| Custom JWT templates | Not listed | |
| Custom session duration | Not listed | |
| Device tracking and revocation | Not listed | |
| Simultaneous sessions | Not listed | |
| Satellite domains | $10/mo each | Not listed |
| Application Logs | 7 day retention | Not listed |
| Admin Logs | Not listed | |
| Full data exports | Not listed | |
| Community support | Not listed | |
| Email support | Not listed | |
| GDPR / DPAs | Not listed | |
| SOC2 report | Not listed | |
| HIPAA compliance | Not listed |
Base price
- Clerk
- $25/mo, $20/mo billed annually
- Lucia
- Not listed
Included applications
- Clerk
- Unlimited
- Lucia
- Not listed
Included MRUs
- Clerk
- 50,000 MRUs included per app; 50,001 - 100,000 $0.02/mo each; 100,001 - 1,000,000 $0.018/mo each; 1,000,001 - 10,000,000
- Lucia
- Not listed
Dashboard seats
- Clerk
- Up to 3
- Lucia
- Not listed
Remove Clerk branding
- Clerk
- Lucia
- Not listed
Social connections
- Clerk
- Unlimited
- Lucia
- Not listed
Usernames
- Clerk
- Lucia
- Not listed
Passwords
- Clerk
- Lucia
- Not listed
Email codes
- Clerk
- Lucia
- Not listed
Email links
- Clerk
- Lucia
- Not listed
SMS codes
- Clerk
- Per SMS fees apply
- Lucia
- Not listed
Sign in tokens
- Clerk
- Lucia
- Not listed
Web3 wallets
- Clerk
- Lucia
- Not listed
Automatic account linking
- Clerk
- Lucia
- Not listed
User metadata
- Clerk
- Lucia
- Not listed
Webhooks for data sync
- Clerk
- Lucia
- Not listed
Passkeys
- Clerk
- Lucia
- Not listed
Biometric sign-in
- Clerk
- Lucia
- Not listed
Custom password requirements
- Clerk
- Lucia
- Not listed
Custom email templates
- Clerk
- Lucia
- Not listed
Multifactor authentication (MFA)
- Clerk
- Lucia
- Not listed
SSO connections
- Clerk
- 1 connection included per app; 2 - 15 $75/mo each; 16 - 100 $60/mo each; 101+ Contact us
- Lucia
- Not listed
Directory Sync connections
- Clerk
- 1 connection included per app; 2 - 15 $75/mo each; 16 - 100 $60/mo each; 101+ Contact us
- Lucia
- Not listed
API Keys
- Clerk
- Creations: 1,000 Included per month, 1,001+ $0.001 each; Verifications: 100,000 Included per month, 100,001+ $0.00001 ea
- Lucia
- Not listed
M2M Tokens
- Clerk
- Creations: 2,500 Included per month, 2,501+ $0.001 each; Verifications: 100,000 Included per month, 100,001+ $0.00001 ea
- Lucia
- Not listed
Account lockout / brute-force protection
- Clerk
- Lucia
- Not listed
Bot protection
- Clerk
- Lucia
- Not listed
Block email subaddresses
- Clerk
- Lucia
- Not listed
Block disposable email addresses
- Clerk
- Lucia
- Not listed
Require invitations
- Clerk
- Lucia
- Not listed
User bans
- Clerk
- Lucia
- Not listed
Allowlist / blocklist
- Clerk
- Lucia
- Not listed
Custom session tokens
- Clerk
- Lucia
- Not listed
Custom JWT templates
- Clerk
- Lucia
- Not listed
Custom session duration
- Clerk
- Lucia
- Not listed
Device tracking and revocation
- Clerk
- Lucia
- Not listed
Simultaneous sessions
- Clerk
- Lucia
- Not listed
Satellite domains
- Clerk
- $10/mo each
- Lucia
- Not listed
Application Logs
- Clerk
- 7 day retention
- Lucia
- Not listed
Admin Logs
- Clerk
- Lucia
- Not listed
Full data exports
- Clerk
- Lucia
- Not listed
Community support
- Clerk
- Lucia
- Not listed
Email support
- Clerk
- Lucia
- Not listed
GDPR / DPAs
- Clerk
- Lucia
- Not listed
SOC2 report
- Clerk
- Lucia
- Not listed
HIPAA compliance
- Clerk
- Lucia
- Not listed
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Which authentication & backend providers fit your needs?
Clerk features & plan notes
- Prebuilt UI
- Organizations
- Everything in Hobby
- 50,000 MRU included per app (Additional $0.02/mo each)
- 1 SSO connection included (Additional $75/mo each)
- 1 Directory Sync connection included (Additional $75/mo each from January 1, 2027)
- Remove Clerk branding
- Multi-factor authentication (MFA)
- Satellite domains (Additional $10/mo each)
- Custom session lifetime
- Application Logs: 7 day retention
- SMS Authentication available
- Machine Authentication: API Keys & M2M Tokens included per month + extra
How to compare authentication & backend providers
Check how each provider defines an active user and separates consumer identity from enterprise organizations. SAML, MFA, custom domains and audit logs can be gated behind higher plans. A backend platform can also charge separately for storage, functions and traffic.
Browse Auth & Backend pricing