ClerkDrop-in authentication and user management for modern web and mobile apps.

Is Clerk cheaper than Auth0?

For many SaaS teams that need paid auth features, Clerk is often cheaper and more transparent. Clerk Pro is $20/mo billed annually and includes 50K MRUs plus 1 Enterprise connection, with published overage rates. Auth0's free tier is generous at 25K MAU, but its paid plans start at $35/mo for Essentials and $240/mo for Professional, with higher user and SSO tiers moving into custom pricing. The gap is clearest for B2B/SSO-heavy apps: Clerk includes one Enterprise connection on Pro with published pricing for additional connections, while larger Auth0 SSO needs move into custom or Enterprise tiers.

Asked by Olga Ivanova · Jun 21, 2026

Is Clerk good for B2C apps?

It depends on the type of B2C app. Clerk can be a strong fit for paid consumer apps, prosumer tools, marketplaces, communities, and subscription products where retained users are valuable and polished auth/user management matters. But if you're building a free, ad-supported, or very low-ARPU consumer app, Clerk's per-MRU model may feel expensive once you outgrow the free tier. In those cases, alternatives like Supabase Auth, which includes 100K MAU on Pro/Team, or Firebase Auth for basic email/social auth may be cheaper. The simple rule: Clerk is easiest to justify when retention maps to revenue; for massive free audiences, run the unit economics first.

Asked by Lindiwe Mahlangu · Jun 9, 2026

What happens to my Clerk bill if my app goes viral?

Less than you might fear. Clerk bills on MRU, not raw signups or MAU, so a spike of users who sign up and never return after the first day does not count toward your MRU bill. If returning users push you past 50K MRUs, Clerk gives you a one-month grace period so your app keeps running while you upgrade. From there, you move to Pro ($20/mo billed annually, or $25/mo monthly) and pay published overage rates for MRUs above 50K, starting at $0.02/MRU/mo with volume discounts at higher tiers.

Asked by Hasan Demir · Jun 2, 2026

Does Clerk offer migration assistance?

Migration assistance is included with our enterprise plan. If you have questions about how to migrate your user data, consult our migration guide or reach out to support any time.

Asked by Odalys Reyes · May 23, 2026

What happens when I exceed the first 50,000 monthly retained users or 100 monthly retained organizations?

Once you exceed 50,000 monthly retained users you will be required to upgrade to the Pro plan. Once you exceed 100 monthly retained organizations, you will be required to upgrade to the B2B Authentication add-on. Each user or organization beyond the free tier allowance will be added to your monthly bill. You'll be given a one-month grace period so your application can continue to operate correctly.

Asked by Katarzyna Zielinska · May 16, 2026