Auth0 vs Firebase Authentication
On the evidence we track, Auth0 leads this comparison with a composite score of 89/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.
Capabilities
Feature-by-feature on the axes that matter for auth & identity software. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
Auth0
LeaderA 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.
Firebase Authentication
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.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Auth0
LeaderFree tier up to 25k MAU, then $35–$240/month. Pricing based on monthly active users.
- FreeFree
- 1 Custom Domain
- Passwordless Authentication
- Unlimited Social Connections
- 5 Organizations
- Brand Customization
- +5 more
- Essentials$35/month, up to 500 monthly active users
- Everything in Free
- Higher Auth and API limits
- Pro Multi-Factor Authentication
- Role-based Access Control per Organization
- 10 Organizations
- +3 more
- Professional$240/month, up to 500 monthly active users
- Everything in Essentials
- Use existing User Database for Logins
- Enterprise Multi-Factor Authentication
- Enhanced Attack Protection
- Machine-to-Machine Tokens
- EnterpriseContact sales
- Everything in Professional
- Custom User & SSO Tiers
- 99.99% SLA
- Enterprise Rate Limits
- Enterprise Administration & Support
- +1 more
Firebase Authentication
Free Spark plan with 50K monthly active users. Blaze plan uses pay-as-you-go pricing.
- SparkFree
- Blaze-
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
Auth0
Leader- Datadog
- Splunk
- AWS
- Azure
- Slack
- Segment
- Salesforce
- Tealium
- Web3Auth
- Spruce ID
- Unstoppable Domains
- Dock.io
- Ethereum Name Service
- NFT services
Firebase Authentication
Not documented yet.
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.