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Clerk vs Auth0

SEPT 2026 audit

A comparison of Clerk and Auth0 built from values read directly from each provider's own documentation, with the source recorded against every figure.

Reviewed by Palash BagchiUpdated 26 criteria comparedSources last checked

Adoption share

BuiltWith counts — how much more of the web runs Auth0 than Clerk, among the sites BuiltWith actually detects. Measured . Source: BuiltWith.

Auth074.2% · 9,589 sites
Clerk25.8% · 3,326 sites

The short answer

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.

Neither quite fits? Every other option, ranked by iScore: Clerk alternatives · Auth0 alternatives

12 sourced criteria separate them — see where, with sources, below.

Visit Clerk documentationVisit Auth0 documentation

No affiliate links, sponsored placements or paid rankings appear on this site. Ordering follows the sourced data and the stated criteria.

01.

At a glance.

CriterionClerkAuth0
Pricing
Free tierYesYes
Kind of free offerFree tierFree tier
What the free plan includes
50,000 monthly retained users per application with one day of application-log retention, and no credit card to start.
25,000 monthly active users at no cost and no credit card to sign up.
Credit card to startNoNo
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 modelA 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.
Startup credit programClerk for Startups: 50,000 monthly retained users and 100 monthly retained organizations free, plus a discretionary discount on Pro features (amount disclosed only on approval). Requires within 1 year of launch and up to $5M in venture funding.Auth0 for Startups: free access for venture-backed companies under $5M funding, under $1M ARR and under two years old.
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-onSupportedSupported
SCIM provisioningSupportedSupported
Multi-factor authenticationSupportedSupported
Audit logsApplication 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.
Support
Support on entry paid planNo support tier is named until Business: Hobby and Pro, the entry paid plan at $20/month, list none. Business adds priority support and Enterprise a premium support SLA with a dedicated Slack channel.Community support on Free; standard support on Essentials ($35/month), the entry paid plan.
Compliance
SOC 2SOC 2 Type 2 certified since May 6, 2022. Report available on Business plan and above via support request.SOC 1, SOC 2 and SOC 3 reports listed in Okta's trust centre (Auth0's parent), available on access request.
ISO 27001
Not ISO 27001 certified. Underlying infrastructure providers (Google Cloud, Cloudflare) hold it.
ISO/IEC 27001:2022, with 27017:2015 and 27018:2019 alongside it; one combined report on access request.
HIPAA
HIPAA certified since May 6, 2022; BAA available on the Enterprise plan.
HIPAA listed among the certifications in Okta's trust centre; no scope detail is published there.
GDPR / data residencySelf-certified under the EU-U.S. Data Privacy Framework, its UK Extension, and the Swiss-U.S. DPF, effective February 22, 2024.GDPR listed among the certifications in Okta's trust centre, alongside EU-US DPF and its UK extension; no residency choice is documented there.
PCI DSS
Makes no PCI DSS claim — Clerk states it never stores cardholder data.
Auth0 offers PCI compliant environment deployment models; the Attestation of Compliance and/or SAQ-D is available on request through the Support Center.

Only criteria both providers publish appear here; a tinted cell marks a real difference. Criteria only one of them documents are listed below, and an absence there means we found no source — not that the feature is missing. How we source this.

The small bar above a value is inetGeek's own lean toward that side — computed from the same facts shown, never a number the provider published. See the picker below "The short answer" to weigh only the criteria you care about.

02.

Where they differ.

What the free plan includes

Clerk

50,000 monthly retained users per application with one day of application-log retention, and no credit card to start.

Auth0

25,000 monthly active users at no cost and no credit card to sign up.

Sources (2) →

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) →

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) →
  • 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 · Report a correction

  • Pricing — Auth0 ↗

    “Free $ 0 / month No credit card needed to sign up. Start building for free Up to 25,000 monthly active users [...] Essentials $ 35 / month For projects with higher production demands. Sign up Up to 500 monthly active users [...] Upgrade to B2B to continue using EC, Self-Service SSO, and SCIM.”

    Read 2026-09-14 · official pricing · Report a correction

Startup credit program

Clerk
Clerk for Startups: 50,000 monthly retained users and 100 monthly retained organizations free, plus a discretionary discount on Pro features (amount disclosed only on approval). Requires within 1 year of launch and up to $5M in venture funding.
Auth0
Auth0 for Startups: free access for venture-backed companies under $5M funding, under $1M ARR and under two years old.
Sources (2) →
  • Clerk for Startups ↗

    “Your team is eligible up to 1 year after launch with up to $5 million in venture funding. [...] 50,000 monthly retained users and 100 monthly retained organizations free.”

    Read 2026-09-11 · official site · Report a correction

  • Auth0 for Startups ↗

    “To qualify for the free Auth0 for Startups program, companies must meet the following criteria: Apply today Venture-backed with less than $5M in funding Less than $1M in annual recurring revenue Less than two years from the date of incorporation”

    Read 2026-09-14 · official site · Report a correction

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.

Sources (2) →
  • 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 · Report a correction

  • Pricing — Auth0 ↗

    “Up to 25,000 monthly active users [...] ESSENTIALS [...] Up to 500 monthly active users”

    Read 2026-09-06 · official pricing · Report a correction

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) →

Support on entry paid plan

Clerk
No support tier is named until Business: Hobby and Pro, the entry paid plan at $20/month, list none. Business adds priority support and Enterprise a premium support SLA with a dedicated Slack channel.
Auth0
Community support on Free; standard support on Essentials ($35/month), the entry paid plan.
Sources (2) →
  • Clerk Pricing ↗

    “SOC2 report enhanced dashboard roles priority support application and admin logs 30 day retention [...] premium support SLA + dedicated Slack channel”

    Read 2026-09-14 · official pricing · Report a correction

  • Auth0 Pricing ↗

    “brand customization basic attack protection community support 1 enterprise connection [...] separate production & development environments standard support”

    Read 2026-09-14 · official pricing · Report a correction

SOC 2

Clerk
SOC 2 Type 2 certified since May 6, 2022. Report available on Business plan and above via support request.
Auth0
SOC 1, SOC 2 and SOC 3 reports listed in Okta's trust centre (Auth0's parent), available on access request.
Sources (2) →

ISO 27001

Clerk
Not ISO 27001 certified. Underlying infrastructure providers (Google Cloud, Cloudflare) hold it.
Auth0
ISO/IEC 27001:2022, with 27017:2015 and 27018:2019 alongside it; one combined report on access request.
Sources (2) →

HIPAA

Clerk
HIPAA certified since May 6, 2022; BAA available on the Enterprise plan.
Auth0
HIPAA listed among the certifications in Okta's trust centre; no scope detail is published there.
Sources (2) →

GDPR / data residency

Clerk
Self-certified under the EU-U.S. Data Privacy Framework, its UK Extension, and the Swiss-U.S. DPF, effective February 22, 2024.
Auth0
GDPR listed among the certifications in Okta's trust centre, alongside EU-US DPF and its UK extension; no residency choice is documented there.
Sources (2) →

PCI DSS

Clerk
Makes no PCI DSS claim — Clerk states it never stores cardholder data.
Auth0
Auth0 offers PCI compliant environment deployment models; the Attestation of Compliance and/or SAQ-D is available on request through the Support Center.
Sources (2) →

When these numbers change, hear about it. Sources are re-checked monthly; a repricing goes out as a short note.

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03.

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 — except where we say we read the other provider's own page on a given date and it does not state it. Those rows lean, and the provider can correct them with a link.

Uptime SLAClerk: 99.99% on Enterprise, which is custom-priced and annual only. Hobby, Pro and Business publish none.
Self-hostableAuth0: Not supported — Documented options are the multi-tenant Public Cloud and Auth0-managed Private Cloud on AWS or Azure.
Price per SSO connectionClerk: One enterprise connection included on Pro, then $75/month each.
Encryption at restAuth0: Envelope encryption at the application layer: data encryption keys are AES-256-GCM and stored next to the data, wrapped by tenant and environment root keys.
Customer-managed keysAuth0: Bring Your Own Key imports a Customer Provided Root Key into a FIPS 140-2 L3 HSM, replacing Auth0's Environment Root Key for the tenant. Only users holding the Key Management Editor tenant role can use it.
Role-based access controlAuth0: Core Authorization provides role-based access control of your APIs: roles and permissions assigned to users, enabled per API from the Dashboard or Management API.
Private networking / VPCAuth0: Private Cloud on AWS only, and outbound only: AWS PrivateLink reaches your own services from the deployment without exposing data to the internet. Set up by Auth0 after you file a request; Private Cloud on Azure uses Azure Private Link.
Dedicated infrastructureAuth0: Private Cloud on AWS is a dedicated, managed instance of the Auth0 platform with single tenancy, against the multi-tenant Public Cloud; Azure has the same option.
04.

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.

Provider pages

ClerkHosted user management with prebuilt UI components, priced on monthly retained users with enterprise connections billed separately.Auth0Okta's developer identity platform, priced by monthly active users with sharply lower allowances on paid tiers than on free.

Related comparisons

Auth0 vs Better AuthAuth0 vs StytchAuth0 vs SuperTokensAuth0 vs WorkOSClerk vs Better AuthClerk vs WorkOSKinde vs Auth0Kinde vs Clerk

Comments

Every page here is sourced and dated.