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authentication-zero

The premium Open Source alternative to Clerk

🎯 Best for:Rails developers who want full control over their authentication logic.
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What is authentication-zero?

Replaces Devise or Clearance for Rails authentication. Generates plain Ruby code instead of hidden library logic to allow full customization and eliminate dependency bloat.

Tech Stack
RubyBackend & Auth

Why authentication-zero?

  • • No hidden library magic
  • • Easy to customize
  • • Minimal dependencies

Limitations

  • • Manual updates required
  • • No built-in UI
  • • Rails only
2/26/2026
Last Update
65
Forks
19
Issues
MIT
License
Financial Leak Detected

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Competitor Cost
-$1,440
/ year (est. based on Clerk)
Self-Hosted
$0
/ year
Team Size10 Users
150+
Launch Detailed Calculator
SAVE 100%

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