Clerk vs Auth0
A comparison of Clerk and Auth0 built from values read directly from each provider's own documentation, with the source recorded against every figure.
The short answer
- Pick Clerk if
- Getting a complete, styled sign-in flow running quickly, with 50,000 users free before any bill starts.
- Pick Auth0 if
- Projects that fit inside the free 25,000 monthly active users, which includes an enterprise connection, self-service SSO and SCIM at no cost.
4 sourced criteria separate them:
- Entry paid plan
- Clerk: $25/month for Pro, or $20/month billed annually. Business is $300/month.
- Auth0: $35/month for Essentials at 500 monthly active users; Professional is $240/month at the same volume. Both scale with the MAU slider.
- Pricing model
- Clerk: A monthly base price plus per-user billing above the included 50,000, with enterprise connections, extra dashboard seats and satellite domains each priced as separate add-ons at $75, $20 and $10 a month.
- Auth0: Per monthly active user, chosen on a slider, with a discontinuity that is easy to miss: the free plan covers 25,000 MAU and includes an enterprise connection, SSO and SCIM, while the paid tiers start at 500 MAU and a footnote says keeping those three features requires upgrading to B2B.
- Users included
- Clerk: 50,000 monthly retained users per app, on the free Hobby plan and on Pro alike. Beyond that, $0.02 each falling to $0.012 above 10 million.
- Auth0: 25,000 monthly active users on the free plan — the largest free allowance here apart from WorkOS. Essentials and Professional start at 500 and are priced upward from there.
- Audit logs
- Clerk: Application logs with 1-day retention on the free Hobby plan; longer retention is a paid-plan feature Clerk lists without publishing the window.
- Auth0: Audit log streaming to Datadog, Splunk, AWS and Azure, from the Essentials plan up. Auth0 publishes no retention window on the pricing page.
Pick the criteria you care about. The chart counts how many of them lean toward each provider — the same read as scanning the bars below, just totalled for the ones you chose.
Clerk 0
Auth0 0
At a glance.
| Criterion | Clerk | Auth0 |
|---|---|---|
| Pricing | ||
| Free tier | Yes | Yes |
| Entry paid plan | $25/month for Pro, or $20/month billed annually. Business is $300/month. | $35/month for Essentials at 500 monthly active users; Professional is $240/month at the same volume. Both scale with the MAU slider. |
| Pricing model | A monthly base price plus per-user billing above the included 50,000, with enterprise connections, extra dashboard seats and satellite domains each priced as separate add-ons at $75, $20 and $10 a month. | Per monthly active user, chosen on a slider, with a discontinuity that is easy to miss: the free plan covers 25,000 MAU and includes an enterprise connection, SSO and SCIM, while the paid tiers start at 500 MAU and a footnote says keeping those three features requires upgrading to B2B. |
| Auth | ||
| Users included | 50,000 monthly retained users per app, on the free Hobby plan and on Pro alike. Beyond that, $0.02 each falling to $0.012 above 10 million. | 25,000 monthly active users on the free plan — the largest free allowance here apart from WorkOS. Essentials and Professional start at 500 and are priced upward from there. |
| SAML single sign-on | Supported | Supported |
| Multi-factor authentication | Supported | Supported |
| Audit logs | Application logs with 1-day retention on the free Hobby plan; longer retention is a paid-plan feature Clerk lists without publishing the window. | Audit log streaming to Datadog, Splunk, AWS and Azure, from the Essentials plan up. Auth0 publishes no retention window on the pricing page. |
Where they differ.
Entry paid plan
- Clerk
- $25/month for Pro, or $20/month billed annually. Business is $300/month.
- Auth0
- $35/month for Essentials at 500 monthly active users; Professional is $240/month at the same volume. Both scale with the MAU slider.
Sources (2) →Sources ↓
- Pricing — Clerk ↗
“Base price $0 $25/mo, $20/mo billed annually $300/mo, $250/mo billed annually”
Read 2026-09-06 · official pricing
- Pricing — Auth0 ↗
“ESSENTIALS $ 35 / month [...] Up to 500 monthly active users [...] PROFESSIONAL $ 240 / month [...] Up to 500 monthly active users”
Read 2026-09-06 · official pricing
Pricing model
- Clerk
- A monthly base price plus per-user billing above the included 50,000, with enterprise connections, extra dashboard seats and satellite domains each priced as separate add-ons at $75, $20 and $10 a month.
- Auth0
- Per monthly active user, chosen on a slider, with a discontinuity that is easy to miss: the free plan covers 25,000 MAU and includes an enterprise connection, SSO and SCIM, while the paid tiers start at 500 MAU and a footnote says keeping those three features requires upgrading to B2B.
Sources (2) →Sources ↓
- Pricing — Clerk ↗
“Base price $0 $25/mo [...] Additional $0.02/mo each [...] Additional $75/mo each [...] Additional $20/mo each [...] Additional $10/mo each”
Read 2026-09-06 · official pricing
- Pricing — Auth0 ↗
“HOW MANY MONTHLY ACTIVE USERS? [...] Up to 25,000 monthly active users [...] ESSENTIALS $ 35 / month Up to 500 monthly active users [...] ¹ Upgrade to B2B to continue using EC, Self-Service SSO, and SCIM.”
Read 2026-09-06 · official pricing
Users included
50,000 monthly retained users per app, on the free Hobby plan and on Pro alike. Beyond that, $0.02 each falling to $0.012 above 10 million.
25,000 monthly active users on the free plan — the largest free allowance here apart from WorkOS. Essentials and Professional start at 500 and are priced upward from there.
Sources (2) →Sources ↓
- Pricing — Clerk ↗
“50,000 MRU limit per app [...] 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 $0.015/mo each 10,000,001+ $0.012/mo each”
Read 2026-09-06 · official pricing
- Pricing — Auth0 ↗
“Up to 25,000 monthly active users [...] ESSENTIALS [...] Up to 500 monthly active users”
Read 2026-09-06 · official pricing
Audit logs
- Clerk
- Application logs with 1-day retention on the free Hobby plan; longer retention is a paid-plan feature Clerk lists without publishing the window.
- Auth0
- Audit log streaming to Datadog, Splunk, AWS and Azure, from the Essentials plan up. Auth0 publishes no retention window on the pricing page.
Sources (2) →Sources ↓
- Pricing — Clerk ↗
“Application Logs 1 day retention [...] Custom session lifetime Application Logs”
Read 2026-09-06 · official pricing
- Pricing — Auth0 ↗
“Stream Auth0 Audit Logs to Datadog, Splunk, AWS, Azure, etc.”
Read 2026-09-06 · official pricing
Which should you choose?
Choose Clerk if…
Getting a complete, styled sign-in flow running quickly, with 50,000 users free before any bill starts.
Editorial · Palash Bagchi · approved
Choose Auth0 if…
Projects that fit inside the free 25,000 monthly active users, which includes an enterprise connection, self-service SSO and SCIM at no cost.
Editorial · Palash Bagchi · approved
Consider something else if…
- Clerk: Enterprise connections are $75/month each after the first, so a B2B product selling to several SSO-using customers pays per logo.
- Auth0: Leaving the free plan is a cliff rather than a step: paid tiers begin at 500 MAU, and a footnote says enterprise connections, SSO and SCIM need a B2B upgrade to keep.
Documented by only one.
These criteria are published by one provider and not the other. An absence here means we have not found a source, not that the feature is missing.
Questions this comparison answers.
Entry paid plan: Clerk or Auth0?
Clerk: $25/month for Pro, or $20/month billed annually. Business is $300/month.
Auth0: $35/month for Essentials at 500 monthly active users; Professional is $240/month at the same volume. Both scale with the MAU slider.
Should I choose Clerk or Auth0?
Pick Clerk if Getting a complete, styled sign-in flow running quickly, with 50,000 users free before any bill starts.
Pick Auth0 if Projects that fit inside the free 25,000 monthly active users, which includes an enterprise connection, self-service SSO and SCIM at no cost.