Self-hosted core service for SuperTokens, an open-source authentication and session management backend that is an alternative to Auth0, Firebase Auth and AWS Cognito.
15.3K786JavaOtherUpdated 8 hours ago
2 alternatives
Best open-source alternatives to Firebase Authentication (2026)
Looking for a free, open-source alternative to Firebase Authentication? These 2 projects can replace it. Each one passed our quality screening and is explained in plain words, so you can compare stars, license and maintenance at a glance.
Quick comparison
| Project | Stars | License | Last commit |
|---|---|---|---|
| supertokens/supertokens-core | ★ 15.3K | Other | 8 hours ago |
| ory/kratos | ★ 13.9K | Apache-2.0 | 3 months ago |
Headless, API-first identity and user management service in Go covering login, registration, recovery, verification and profile flows.
13.9K1.2KGoApache-2.0Updated 3 months ago
FAQ
- Is there a free, open-source alternative to Firebase Authentication?
- Yes. The most popular open-source alternatives to Firebase Authentication on Repolode are supertokens-core, kratos.
- Which Firebase Authentication alternative should I choose?
- supertokens-core has the most GitHub stars and is released under Other. Compare the license and last commit of each option in the table above before choosing.