Compare
Auth0 vs Keycloak
Short answer: Pick Auth0 if you want unified identity platform for apps and AI agents; pick Keycloak if you want open-source SSO and auth management. Auth0 has a free plan, paid from $35/month; Keycloak is free and open source.
Which to pick
Pick Auth0 if you want…
- Unified identity platform for apps and AI agents
- Managed SaaS authentication
- Integrations with Okta universal logout (on Auth0's list, not Keycloak's)
Pick Keycloak if you want…
- Open-source SSO and auth management
- Enterprise-grade managed identity
- A free, open-source tool
- Integrations with OpenID Connect, OAuth 2.0 or SAML 2.0 (on Keycloak's list, not Auth0's)
Auth0 is a hosted commercial service, while Keycloak is self-hosted open source.
Side by side
- What it is
- Auth0:Auth0 provides scalable authentication and authorization for apps, APIs, and AI agents.
- Keycloak:Keycloak is an open-source identity and access management solution providing SSO, social login, and fine-grained authorization.
- Best for
- Auth0:Unified identity platform for apps and AI agents
- Keycloak:Open-source SSO and auth management
- Who it’s for
- Auth0:Developers building B2C, B2B SaaS, AI agents, or machine-to-machine services.
- Keycloak:Developers and ops teams needing centralized authentication for apps and services
- Pricing
- Auth0:Freemium
- Keycloak:Open source
- Starting price
- Auth0:$35/month (Essentials)
- Keycloak:Free
- Free plan or trial
- Auth0:Free plan (Free) · Free trial
- Keycloak:Free to use
- Plans
- Auth0:Free $0 · Essentials $35 per month · Professional $240 per month
- Keycloak:—
- Open source
- Auth0:—
- Keycloak:Yes, 37,083 GitHub stars
- Works with
- Auth0:Okta universal logout
- Keycloak:OpenID Connect, OAuth 2.0, SAML 2.0, LDAP, Active Directory
Auth0 features
- Universal Login. Customizable login experience with passwordless, social, and adaptive MFA.
- Single Sign-On. Enterprise federation and cross-app SSO for human users and AI agents.
- Machine-to-Machine Auth. Short-lived tokens, client-credentials flow and M2M add-ons for services.
- Fine-Grained Authorization. Scalable APIs for granular access control, including RAG and AI contexts.
- Token Vault & MCP Auth. Secure storage of tokens and authorization for model-context protocols.
- Extensibility via Actions & Forms. Serverless hooks and no-code visual editor to extend login flows.
Keycloak features
- Single-Sign-On. Users log in once to access multiple applications without re-authenticating.
- Identity Brokering & Social Login. Add social network or external OpenID Connect/SAML providers via the admin console without code changes.
- User Federation. Connect to existing LDAP or Active Directory directories, or custom user stores.
- Admin & Account Consoles. Central UI for managing apps, users, policies and for users to manage profiles and MFA.
- Authorization Services. Define fine-grained permission policies beyond role-based access.
- Standard Protocol Support. Built-in OpenID Connect, OAuth 2.0 and SAML 2.0 support.
Auth0 vs Keycloak FAQ
What is the difference between Auth0 and Keycloak?+
Keycloak is open-source and self-managed, Auth0 provides managed cloud with extensive AI-agent capabilities. Auth0 is a hosted commercial service, while Keycloak is self-hosted open source.
Should I use Auth0 or Keycloak?+
Pick Auth0 if you want unified identity platform for apps and AI agents, managed SaaS authentication or integrations with Okta universal logout (on Auth0's list, not Keycloak's). Pick Keycloak if you want open-source SSO and auth management, enterprise-grade managed identity or a free, open-source tool.
Is Auth0 or Keycloak free?+
Auth0 has a free plan; paid plans start at $35/month (Essentials). Keycloak is free and open source.
Which is cheaper, Auth0 or Keycloak?+
Keycloak is free, so it costs less. Auth0 starts at $35/month (Essentials).
Is Auth0 or Keycloak open source?+
Keycloak is open source (keycloak/keycloak on GitHub, Apache-2.0 license). DevHunt has no public source repository on record for Auth0.
Do Auth0 and Keycloak integrate with the same tools?+
Their integration lists don't overlap: Auth0 lists Okta universal logout; Keycloak lists OpenID Connect, OAuth 2.0, SAML 2.0, LDAP and 1 more.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.