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Auth0 vs Zitadel
Short answer: Pick Auth0 if you want unified identity platform for apps and AI agents; pick Zitadel if you want API-first multi-tenant identity infrastructure. Auth0 has a free plan, paid from $35/month; Zitadel has a free plan.
Auth0Authentication and authorization platform
ZitadelOpen-source identity infrastructure with SSO and multi-tenancyWhich to pick
Pick Auth0 if you want…
- Unified identity platform for apps and AI agents
- Hosted SaaS authentication
- Integrations with Okta universal logout (on Auth0's list, not Zitadel's)
Pick Zitadel if you want…
- API-first multi-tenant identity infrastructure
- Open-source code (zitadel/zitadel on GitHub, AGPL-3.0 license)
- Integrations with Google, Microsoft or GitHub (on Zitadel's list, not Auth0's)
Side by side
- What it is
- Auth0:Auth0 provides scalable authentication and authorization for apps, APIs, and AI agents.
- Zitadel:ZITADEL is an open-source, multi-tenant identity platform offering SSO, passwordless login and role-based access via APIs.
- Best for
- Auth0:Unified identity platform for apps and AI agents
- Zitadel:API-first multi-tenant identity infrastructure
- Who it’s for
- Auth0:Developers building B2C, B2B SaaS, AI agents, or machine-to-machine services.
- Zitadel:Developers building consumer, B2B or employee applications needing authentication and authorization.
- Pricing
- Auth0:Freemium
- Zitadel:Freemium
- Starting price
- Auth0:$35/month (Essentials)
- Zitadel:—
- Free plan or trial
- Auth0:Free plan (Free) · Free trial
- Zitadel:Free trial
- Plans
- Auth0:Free $0 · Essentials $35 per month · Professional $240 per month
- Zitadel:FREE US$0/Month · PRO US$100/Month per month
- Open source
- Auth0:—
- Zitadel:Yes, 15,146 GitHub stars
- Works with
- Auth0:Okta universal logout
- Zitadel:Google, Microsoft, GitHub, REST API, gRPC
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.
Zitadel features
- Hosted login UI. Customizable hosted login page with social and passwordless options.
- API-first authentication. REST and gRPC APIs to embed login flows directly in applications.
- Role-Based Access Control. Define permissions per role for fine-grained authorization.
- Multi-tenant core. Create unlimited organizations and projects to isolate customers.
- Extensible actions. Run workflow scripts on predefined events without deploying code.
- Multi-factor & Passkeys. Enforce MFA or passwordless passkey authentication for stronger security.
Auth0 vs Zitadel FAQ
What is the difference between Auth0 and Zitadel?+
Auth0 is a hosted SaaS auth service, while ZITADEL offers open-source self-hosted and cloud options with multi-tenant focus.
Should I use Auth0 or Zitadel?+
Pick Auth0 if you want unified identity platform for apps and AI agents, hosted SaaS authentication or integrations with Okta universal logout (on Auth0's list, not Zitadel's). Pick Zitadel if you want API-first multi-tenant identity infrastructure, open-source code (zitadel/zitadel on GitHub, AGPL-3.0 license) or integrations with Google, Microsoft or GitHub (on Zitadel's list, not Auth0's).
Is Auth0 or Zitadel free?+
Auth0 has a free plan; paid plans start at $35/month (Essentials). Zitadel has a free plan and paid plans.
Is Auth0 or Zitadel open source?+
Zitadel is open source (zitadel/zitadel on GitHub, AGPL-3.0 license). DevHunt has no public source repository on record for Auth0.
Do Auth0 and Zitadel integrate with the same tools?+
Their integration lists don't overlap: Auth0 lists Okta universal logout; Zitadel lists Google, Microsoft, GitHub, REST API and 1 more.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.