Is Auth0 or Keycloak better?

Neither clearly leads. Auth0 starts at Free and Keycloak at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Auth0 or Keycloak?

Auth0 starts at Free and Keycloak at Free.

Does Auth0 or Keycloak run on more platforms?

Auth0 runs on Web, iOS, Android. Keycloak runs on Self-hosted, Docker, Kubernetes, Linux, Windows, API.

Can I use Auth0 for free?

Both have a free tier, so you can try either at no cost before committing.

What is Auth0 best used for?

Auth0 is most often used for b2c authentication, b2b authentication, b2e authentication, api security. Of those, b2c authentication and b2b authentication are not what Keycloak is typically brought in for.

What can Auth0 do that Keycloak cannot?

Auth0 covers Universal login, Social login, Multi-factor authentication, Passwordless.

Technology · head to head

Auth0 vs Keycloak

Auth0

Technology

Secure access for everyone

From: Free
Free plan: Yes

Full review Website

Keycloak

Developer Tools

Open-source identity and access management server.

From: Free
Free plan: Yes

Full review Website

The short version

Each has a real cost: Auth0 free tier limited to 25,000 monthly active users, requiring upgrade for growth beyond that; Keycloak requires self-hosted deployment and operational expertise to install, configure and maintain
Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Auth0 and Keycloak actually diverge.

Attributes where Auth0 and Keycloak differ
Attribute	Auth0	Keycloak
Pricing model	Unknown	open-source
Platforms	Web, iOS, Android	Self-hosted, Docker, Kubernetes, Linux, Windows, API
Category	Technology	Developer Tools
Founded	2013	Unknown

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Auth0

Universal login
Social login
Multi-factor authentication
Passwordless
User management
Anomaly detection
Extensibility
Machine to machine

Only in Keycloak

Nothing recorded that Auth0 does not also cover.

What people use each for

The jobs each tool is most often brought in to do.

Auth0

B2C authenticationnot Keycloak
B2B authenticationnot Keycloak
B2E authenticationnot Keycloak
API securitynot Keycloak
Mobile app securitynot Keycloak

Keycloak

Organisations requiring self-hosted identity infrastructure for compliance or data residencynot Auth0
Companies with existing LDAP/Active Directory systems needing federated authenticationnot Auth0
Open-source projects and communities requiring free IAM without licensing costsnot Auth0
Enterprises building custom identity workflows requiring fine-grained authorisationnot Auth0
Teams with sufficient operational expertise to manage infrastructurenot Auth0

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Auth0

Free tier limited to 25,000 monthly active users, requiring upgrade for growth beyond that
Advanced features like MFA and RBAC only available on paid Essentials tier and above
Ownership by Okta introduces risk that independent product roadmap may change

Keycloak

Requires self-hosted deployment and operational expertise to install, configure and maintain
No managed cloud option provided by Red Hat; organisations must operate infrastructure themselves or use third-party distributions
Clustering and high-availability configurations require additional operational knowledge
Community support only; commercial support requires third-party vendors or distributions

Pricing, plan by plan

Auth0

Free

FreeFree
- Up to 25,000 monthly active users
- Basic authentication
- Email/password login
Essentials (B2C)$35/month
- Unlimited MAUs beyond free tier
- Multi-Factor Authentication
- Role-Based Access Control
Professional (B2C)$240/month
- All Essentials features
- Advanced security
- Custom branding

Keycloak

Free

Open-sourceFree
- Full platform functionality
- Self-hosted deployment
- Community support

Which should you pick?

Choose Auth0 if

You need universal login.
You want to start without paying.
You work on Web, iOS, Android.
You also want social login.

Auth0 review

Choose Keycloak if

You want to start without paying.
You work on Self-hosted, Docker, Kubernetes, Linux, Windows, API.

Keycloak review

Questions people ask

Is Auth0 or Keycloak better?: Neither clearly leads. Auth0 starts at Free and Keycloak at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Auth0 or Keycloak?: Auth0 starts at Free and Keycloak at Free.
Does Auth0 or Keycloak run on more platforms?: Auth0 runs on Web, iOS, Android. Keycloak runs on Self-hosted, Docker, Kubernetes, Linux, Windows, API.
Can I use Auth0 for free?: Both have a free tier, so you can try either at no cost before committing.
What is Auth0 best used for?: Auth0 is most often used for b2c authentication, b2b authentication, b2e authentication, api security. Of those, b2c authentication and b2b authentication are not what Keycloak is typically brought in for.
What can Auth0 do that Keycloak cannot?: Auth0 covers Universal login, Social login, Multi-factor authentication, Passwordless.

Answered from the vendors’ own pages

Auth0: How much does Auth0 cost?

Auth0 has a Free tier for up to 25,000 monthly active users (MAUs). Paid plans start at $35/month (Essentials B2C) and scale to $240/month (Professional B2C) and higher for Enterprise. Pricing scales with MAU usage.

Source

Keycloak: What protocols does Keycloak support?

Keycloak supports OpenID Connect, OAuth 2.0 and SAML 2.0 protocols for authentication and authorisation.

Source

Auth0: Does Auth0 include Multi-Factor Authentication?

No. MFA, RBAC (Role-Based Access Control), and premium support are not included in the free tier and require upgrading to paid Essentials plans or higher.

Source

Keycloak: Can Keycloak integrate with existing user directories?

Yes. Keycloak supports user federation with LDAP and Active Directory systems, allowing organisations to leverage existing user directories.

Source

Auth0: Is Auth0 independent or part of a larger company?

Auth0 was acquired by Okta in May 2021 for $6.5 billion. It now operates as a subsidiary business unit within Okta, but maintains its own brand and operations.

Source

Keycloak: Is Keycloak free?

Yes. Keycloak is fully open-source and free to deploy and use. No licensing fees are required.

Source

Auth0: Who should use Auth0 vs Okta?

Auth0 is developer-focused and serves customer identity use cases (B2C). Okta serves workforce identity (B2B) and has broader enterprise features. Auth0 now serves both markets post-acquisition but maintains its developer-friendly positioning.

Source

Auth0 vs Keycloak

Auth0

Keycloak

The short version

Where they differ

What each one covers

Only in Auth0

Only in Keycloak

What people use each for

Auth0

Keycloak

Where each one falls short

Auth0

Keycloak

Pricing, plan by plan

Auth0

Keycloak

Which should you pick?

Choose Auth0 if

Choose Keycloak if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Auth0

More on Keycloak

Keep looking

Other head to heads