fosite
The premium Open Source alternative to Auth0
🎯 Best for:Go developers building custom identity providers
What is fosite?
Replaces proprietary identity providers like Auth0 or Okta for Go developers. Implements the full OAuth2 and OIDC specifications with a focus on security and extensibility.
Tech Stack
GoBackend & Auth
Why fosite?
- • Strict spec compliance
- • Highly extensible architecture
- • Security-first design
Limitations
- • Steep learning curve
- • No built-in UI
- • Go language specific
3/5/2026
Last Update
330
Forks
49
Issues
Apache-2.0
License
Financial Leak Detected
Stop the "SaaS Tax"
Your team could be burning cash. Switching to fosite instantly boosts your runway.
Competitor Cost
-$1,440
/ year (est. based on Auth0)
Self-Hosted
$0
/ year
Team Size10 Users
150+
SAVE 100%