Auth0 vs Firebase Auth
Updated Aug 23, 2026
Quick Verdict
Firebase Auth has 4.9x more GitHub stars.
GitHub Stars
Auth0 1.1K
vs
Firebase Auth 5.1K
Downloads/wk
Auth0 0
vs
Firebase Auth 9.7M
Contributors
Auth0 127
vs
Firebase Auth 234
Bundle Size
Auth0 79.7 KB
vs
Firebase Auth N/A
Detailed Comparison
Side-by-side metrics from GitHub and npm
Metric
Auth0
Firebase Auth
GitHub Stars
1.1K
5.1K
Weekly Downloads
0
9.7M
Forks
510
1.0K
Open Issues
3
731
Contributors
127
234
Bundle Size (gzip)
79.7 KB
N/A
Dependencies
3
28
Latest Version
6.3.0
12.18.0
Last Commit
Aug 13, 2026
Aug 21, 2026
License
MIT
NOASSERTION
First Published
Dec 3, 2012
Feb 21, 2012
Feature Comparison
Framework capabilities at a glance
Feature
Auth0
Firebase Auth
Oauth
Magic Links
Mfa
Session
Jwt
Social Login
Self Hosted
Frequently Asked Questions
Common questions about Auth0 vs Firebase Auth
Is Auth0 better than Firebase Auth?
It depends on your use case. Auth0 is flexible, drop-in identity and access management solution, while Firebase Auth is google's authentication service for web and mobile apps. Compare the stats and features above to decide which fits your needs.
Is Auth0 still maintained in 2026?
Yes, Auth0 was last updated on August 13, 2026 and has 127 contributors.
Can I migrate from Auth0 to Firebase Auth?
Migration complexity depends on how deeply Auth0 is integrated into your project. Both tools serve similar purposes in the Authentication space, so migration is generally feasible with proper planning.
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