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Auth0 vs Firebase
Short answer: Pick Auth0 if you want unified identity platform for apps and AI agents; pick Firebase if you want integrated backend services for apps. Auth0 has a free plan, paid from $35/month; Firebase has a free plan.
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
- Starting price
- Auth0:$35/month (Essentials)
- Firebase:—
- Free plan or trial
- Auth0:Free plan (Free) · Free trial
- Firebase:Free plan (Spark (Free)) · Free trial
- 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
What is the difference between Auth0 and Firebase?+
Firebase provides a broader backend (database, hosting) while Auth0 focuses on identity only.
Should I use Auth0 or Firebase?+
Pick Auth0 if you want unified identity platform for apps and AI agents or 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 or integrations with iOS, Android or Web (on Firebase's list, not Auth0's).
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.