# Auth0 vs Firebase Authentication

**Leader by Vioscale score:** Auth0

| Attribute | Auth0 | Firebase Authentication |
|---|---|---|
| **Vioscale score** | 88.5 (72% (medium)) | 65.5 (26% (low)) |
| deployment.options | `{"cloud":true,"self_hosted":true}` | `{"cloud":true}` |
| description.long | A managed authentication service that handles user identity verification, single sign-on, and API security. Supports passwordless login, multi-factor authentication, role-based access control, and machine-to-machine authentication with enterprise-grade features for compliance and security. | A backend authentication service offering SDKs and UI components to integrate user sign-in across web and mobile platforms. Supports email, password, phone, and social login methods, with customizable UI options and pre-built components. |
| features.capabilities | `{"mfa":true,"oidc":true,"rbac":true,"hosting":"cloud","saml_sso":true,"hosted_ui":"both","open_source":false,"passwordless":true,"social_login":true,"b2b_multi_tenant":true,"passkeys_webauthn":true,"scim_provisioning":true}` | `{"oidc":true,"hosting":"cloud","saml_sso":true,"hosted_ui":"both","open_source":false,"passwordless":true,"social_login":true}` |
| integrations.count | 14 | - |
| integrations.list | `[{"name":"Datadog"},{"name":"Splunk"},{"name":"AWS"},{"name":"Azure"},{"name":"Slack"},{"name":"Segment"},{"name":"Salesforce"},{"name":"Tealium"},{"name":"Web3Auth"},{"name":"Spruce ID"},{"name":"Unstoppable Domains"},{"name":"Dock.io"},{"name":"Ethereum Name Service"},{"name":"NFT services"}]` | - |
| market.availability | `{"hqCountry":"US","primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | `{"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"ios":true,"web":true,"android":true}` | `{"cli":true,"ios":true,"mac":true,"web":true,"android":true}` |
| pricing | `{"type":"subscription","plans":[{"free":true,"name":"Free","summary":"Free, up to 25,000 monthly active users","features":["1 Custom Domain","Passwordless Authentication","Unlimited Social Connections","5 Organizations","Brand Customization","Basic Attack Protection","Community Support","1 Enterprise Connection","Self-Service SSO","SCIM"],"commitment":"monthly","components":[{"kind":"fixed","amount":0,"period":"month","currency":"USD"}],"description":"For getting started with authentication","contactSales":false,"includedLimits":{"monthly_active_users":"25000"}},{"free":false,"name":"Essentials","summary":"$35/month, up to 500 monthly active users","features":["Everything in Free","Higher Auth and API limits","Pro Multi-Factor Authentication","Role-based Access Control per Organization","10 Organizations","Stream Audit Logs to Datadog, Splunk, AWS, Azure","Separate Production & Development Environments","Standard Support"],"commitment":"monthly","components":[{"kind":"fixed","amount":35,"period":"month","currency":"USD"}],"description":"For projects with higher production demands","contactSales":false,"includedLimits":{"monthly_active_users":"500"}},{"free":false,"name":"Professional","summary":"$240/month, up to 500 monthly active users","features":["Everything in Essentials","Use existing User Database for Logins","Enterprise Multi-Factor Authentication","Enhanced Attack Protection","Machine-to-Machine Tokens"],"commitment":"monthly","components":[{"kind":"fixed","amount":240,"period":"month","currency":"USD"}],"description":"For teams and projects that need added security","contactSales":false,"includedLimits":{"monthly_active_users":"500"}},{"free":false,"name":"Enterprise","summary":"Custom pricing with 99.99% SLA and enterprise support","features":["Everything in Professional","Custom User & SSO Tiers","99.99% SLA","Enterprise Rate Limits","Enterprise Administration & Support","Advanced Security Features"],"description":"For enterprises needing to scale with top-tier support","contactSales":true}],"addOns":[{"name":"Private Deployment"},{"name":"Machine-to-Machine (M2M) Add-on"}],"summary":"Free tier up to 25k MAU, then $35–$240/month. Pricing based on monthly active users.","currency":"USD","freeTier":true,"sourceUrl":"https://auth0.com/pricing","retrievedAt":"2026-08-14T12:15:50.906Z","startingPrice":{"amount":35,"period":"month","currency":"USD"},"billingPeriods":["month"]}` | `{"type":"hybrid","plans":[{"free":true,"name":"Spark","description":"Free tier with usage limits","contactSales":false,"includedLimits":{"saml_oidc_users":"50","monthly_active_users":"50K"}},{"free":false,"name":"Blaze","description":"Pay-as-you-go with Spark free tier limits included, then usage-based billing","contactSales":false,"includedLimits":{"saml_oidc_users":"50","monthly_active_users":"50K"}}],"summary":"Free Spark plan with 50K monthly active users. Blaze plan uses pay-as-you-go pricing.","currency":"USD","freeTier":true,"sourceUrl":"https://firebase.google.com/pricing","retrievedAt":"2026-08-14T15:28:10.980Z","billingPeriods":["month"]}` |
| pricing.free_tier | yes | yes |
| pricing.model | freemium | freemium |
| pricing.price_level | mid | low |
| pricing.transparent | yes | yes |
| reliability.sla_pct | 99.99 | - |
| reliability.status_page | yes | yes |
| security.disclosure_policy | yes | - |
| security.fedramp | yes | - |
| security.gdpr | yes | - |
| security.hipaa | yes | - |
| security.iso27001 | yes | - |
| security.pci | yes | - |
| security.soc2 | yes | - |

## Capabilities (Auth & Identity Software)

| Capability | Auth0 | Firebase Authentication |
|---|:--:|:--:|
| **Deployment** |  |  |
| Hosting | Cloud only | Cloud only |
| **Methods** |  |  |
| Social login | ✓ | ✓ |
| Passwordless | ✓ | ✓ |
| Passkeys / WebAuthn | ✓ | - |
| Multi-factor auth | ✓ | - |
| **Enterprise** |  |  |
| SAML SSO | ✓ | ✓ |
| SCIM provisioning | ✓ | - |
| B2B / multi-tenancy | ✓ | - |
| **Standards** |  |  |
| OpenID Connect provider | ✓ | ✓ |
| **Delivery** |  |  |
| Hosted UI | Both | Both |
| **Access** |  |  |
| RBAC | ✓ | - |
| **Licensing** |  |  |
| Self-hostable OSS core | ✗ | ✗ |

*Source: Vioscale. Generated 2026-09-01T16:29:24.654Z. "-" = undocumented, not absent.*