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Auth0 vs Firebase
Firebase provides a broader backend (database, hosting) while Auth0 focuses on identity only.
Which to pick
Pick Auth0 if you want…
- Unified identity platform for apps and AI agents
- Integrations with Okta universal logout (on Auth0's list, not Firebase's)
Pick Firebase if you want…
- Integrated backend services for apps
- Full-stack app backend with auth
- Integrations with iOS, Android or Web (on Firebase's list, not Auth0's)
Side by side
- What it is
- Auth0:Auth0 provides scalable authentication and authorization for apps, APIs, and AI agents.
- Firebase:Firebase is Google’s platform of services for building, running and scaling mobile and web apps.
- Best for
- Auth0:Unified identity platform for apps and AI agents
- Firebase:Integrated backend services for apps
- Who it’s for
- Auth0:Developers building B2C, B2B SaaS, AI agents, or machine-to-machine services.
- Firebase:Mobile and web developers building modern applications.
- Pricing
- Auth0:Freemium
- Firebase:Freemium
- Plans
- Auth0:Free $0 · Essentials $35 per month · Professional $240 per month
- Firebase:Spark (Free) $0
- Works with
- Auth0:Okta universal logout
- Firebase:iOS, Android, Web, Flutter, Unity, C++, Google Ads, AdMob
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.
Firebase features
- Authentication. Provides user sign-in, phone auth and identity platform with generous free limits.
- Realtime Database & Firestore. Scalable NoSQL databases with real-time sync and offline support.
- Hosting & Cloud Functions. Static web hosting with SSL and serverless functions for backend logic.
- Crashlytics & Performance Monitoring. Live crash reporting and performance metrics to improve app quality.
- Remote Config & A/B Testing. Feature flagging and experiments to personalize user experiences.
- Firebase AI Logic. Generative AI integration powered by Gemini and Google Cloud pricing.
Auth0 vs Firebase FAQ
Is Auth0 or Firebase free?+
Auth0 has a free plan; paid plans start at $35/month (Essentials). Firebase has a free plan (Spark (Free)) and paid plans.
Do Auth0 and Firebase integrate with the same tools?+
Their integration lists don't overlap: Auth0 lists Okta universal logout; Firebase lists iOS, Android, Web, Flutter and 9 more.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.