fosite

The premium Open Source alternative to Auth0

🎯 Best for:Go developers building custom identity providers
Visit WebsiteCompare with Auth0
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Apache-2.0License

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%

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