Auth0 vs Clerk
Updated October 2026 · AppBreakup editorial
Auth0
Okta's developer-focused identity platform for adding login, SSO and user management to apps.
Clerk
Drop-in authentication and user management with prebuilt UI components for React and Next.js apps.
The short answer
Pick Clerk if you build with React or Next.js and want polished, prebuilt sign-in components working quickly. Pick Auth0 if you need SDKs for many languages, custom login logic through Actions, or a long track record with enterprises. The biggest difference is approach: Clerk is component-first and frontend-focused, while Auth0 is a broader identity platform with steeper pricing once you need B2B features.
Auth0 or Clerk: our take
Clerk gives you drop-in widgets for sign-in, sign-up, user profiles and organisation switching, and handles sessions, social logins, passkeys, MFA and bot protection behind them. Its Next.js and React SDKs are first-class, with support for Remix, Astro, Expo and several back-end languages; newer products add billing and API keys. Auth0, part of Okta since 2021, uses a hosted Universal Login page or embedded SDKs and covers passwords, social, passwordless, MFA and enterprise SSO. It has quickstarts for nearly every language and framework, and Actions run custom JavaScript during login and sign-up. B2B plans add organisations, self-service SSO and SCIM; Clerk also offers organisations, roles, enterprise SSO and directory sync.
Both have generous free tiers: Auth0 up to 25,000 monthly active users, Clerk up to 50,000 monthly retained users per app. Auth0's paid Essentials plan starts from $35/month, it offers a 22-day trial of paid features and a free year for eligible startups, and costs rise sharply for advanced MFA or many SSO connections. Clerk Pro is $20/month billed annually, plus usage charges, and each extra SSO connection costs $75/month. Both are cloud services, so user data lives with the vendor; Auth0 offers private cloud deployments for large customers.
For a startup or product team on React or Next.js that wants a good-looking login in an afternoon, Clerk is usually faster and cheaper to start. For teams on other stacks, those needing custom flow logic, or companies that want a widely documented provider with enterprise options, Auth0 is the safer pick. Model costs for your expected user count and SSO needs before committing to either.
Which should you pick?
Choose Auth0 if…
- Product teams that want a mature hosted login with SDKs for almost every stack
- SDKs and quickstarts for nearly every language and framework
- Actions allow custom logic in login and sign-up flows
Choose Clerk if…
- React and Next.js developers who want polished sign-in screens working in minutes
- You need iOS and Android, which Auth0 doesn't list
- Prebuilt, customisable UI components save weeks of work
- Excellent Next.js and React integration
About each app
What is Auth0?
Auth0 is a hosted customer identity service: you redirect users to its Universal Login page or embed its SDKs, and it handles passwords, social logins, passwordless, multi-factor authentication, enterprise SSO and user storage. It has been part of Okta since 2021 and is one of the most widely used auth services, so SDKs, quickstarts and community answers exist for nearly every language and framework. Actions let you run custom JavaScript during login and sign-up flows, and the B2B plans add organisations, self-service SSO and SCIM. The free plan is generous for consumer apps, but paid plans are priced by monthly active users and the jump to enterprise features like advanced MFA or many SSO connections can be steep. It runs only as a cloud service, with optional private cloud deployments for large customers. Teams usually pick it when they want a mature, well-documented option and are comfortable with usage-based pricing.
What is Clerk?
Clerk is a hosted auth service built around ready-made components: you add sign-in, sign-up, user profile and organisation switcher widgets to your app and Clerk handles sessions, passwords, social logins, passkeys, MFA and bot protection behind them. It is especially popular in the Next.js and React world, with first-class SDKs for those frameworks, though it also supports Remix, Astro, Expo, plain JavaScript and several back-end languages. B2B features include organisations, roles, invitations, enterprise SSO and directory sync, and newer products add billing and API keys for machine access. The free Hobby plan covers a lot of users, and paid plans add a monthly base price plus per-user and per-connection charges. It is a cloud-only service, so your user data lives with Clerk. Developers like how quickly it gets a polished login working; the trade-off is less control over flows than a self-hosted library.
Side by side
| Attribute | Auth0 | Clerk |
|---|---|---|
| Pricing | Free plan + paid | Free plan + paid |
| Open source | No | No |
| Self-hostable | No | No |
| Platforms | Web | Web, iOS, Android |
| Best for | Product teams that want a mature hosted login with SDKs for almost every stack | React and Next.js developers who want polished sign-in screens working in minutes |
| Status | Active | Active |
Verified facts, compared
Facts both apps publish, checked on each vendor's own site.
| Fact | Auth0 | Clerk |
|---|---|---|
| Free plan | Up to 25,000 monthly active users | Up to 50,000 monthly retained users per app |
Auth0 vs Clerk pricing
Auth0: free plan + paid
- Free plan: Up to 25,000 monthly active users source
- Free trial: 22 days of paid features source
- Starting price: Essentials from $35/month source
Clerk: free plan + paid
- Free plan: Up to 50,000 monthly retained users per app source
- Pro price: $20/month billed annually source
Platforms
| Platform | Auth0 | Clerk |
|---|---|---|
| Web | ||
| iOS | ||
| Android |
Auth0 facts
4 of 4 verified- Free plan
- Up to 25,000 monthly active users
- Checked Oct 25, 2026auth0.com(opens source in a new tab)
- “Start building for free Up to 25,000 monthly active users”
- Free trial
- 22 days of paid features
- Checked Oct 25, 2026auth0.com(opens source in a new tab)
- “The trial period lasts 22 days.”
- Startup program
- Free for a year for eligible startups
- Checked Oct 25, 2026auth0.com(opens source in a new tab)
- “Did we mention our startup program is free for a year?”
- Starting price
- Essentials from $35/month
- Checked Oct 25, 2026auth0.com(opens source in a new tab)
- “Essentials $ 35 / month For projects with higher production demands.”
Clerk facts
4 of 4 verified- Free plan
- Up to 50,000 monthly retained users per app
- Checked Oct 25, 2026clerk.com(opens source in a new tab)
- “Start building for free Included in Hobby: Up to 3 dashboard seats Unlimited applications 50,000 MRU limit per app”
- Pro price
- $20/month billed annually
- Checked Oct 25, 2026clerk.com(opens source in a new tab)
- “$20 per month, billed annually Scale with full-featured authentication.”
- Extra SSO connection
- $75/month each
- Checked Oct 25, 2026clerk.com(opens source in a new tab)
- “1 SSO connection included Additional $75/mo each”
- Compliance
- SOC 2 Type 2
- Checked Oct 25, 2026clerk.com(opens source in a new tab)
- “Clerk is SOC 2 type 2 compliant and CCPA compliant.”
Pros and cons of Auth0
- SDKs and quickstarts for nearly every language and framework
- Actions allow custom logic in login and sign-up flows
- Large free tier for consumer apps
- Costs rise sharply once you need B2B or enterprise features
- Cloud only for most customers; no self-hosted edition
- Dashboard and docs can be confusing alongside Okta's own products
Pros and cons of Clerk
- Prebuilt, customisable UI components save weeks of work
- Excellent Next.js and React integration
- Generous free tier per application
- Cloud only; user data cannot be self-hosted
- Enterprise SSO connections are billed individually
- Less flexible than code-first libraries for unusual flows
Other apps to consider
WorkOSInstead of Auth0
Better fit for B2B SaaS that mainly needs enterprise SSO and SCIM, with a free first million users.
KeycloakInstead of Auth0
Free, self-hosted and standards-based, for teams that would rather run identity themselves.
FusionAuthInstead of Auth0
Similar feature set with a free self-hosted Community edition and no per-user cloud lock-in.
Better AuthInstead of Clerk
Free open-source TypeScript library that keeps users in your own database.
KindeInstead of Clerk
Similar developer-friendly hosted auth with billing and feature flags included.
- StStytch
Instead of Clerk
API-first alternative with strong fraud and bot protection for consumer and B2B apps.
Auth0 vs Clerk: common questions
Is Auth0 better than Clerk?
Pick Clerk if you build with React or Next.js and want polished, prebuilt sign-in components working quickly. Pick Auth0 if you need SDKs for many languages, custom login logic through Actions, or a long track record with enterprises. The biggest difference is approach: Clerk is component-first and frontend-focused, while Auth0 is a broader identity platform with steeper pricing once you need B2B features.
Is Auth0 free?
Auth0 has a free plan, with paid plans for more features. See its verified pricing facts above for current limits.
Is Clerk free?
Clerk has a free plan, with paid plans for more features. See its verified pricing facts above for current limits.
Is Auth0 or Clerk open source?
Neither is open source.
Which platforms do Auth0 and Clerk support?
Auth0: Web. Clerk: Web, iOS and Android.