inboxer

The premium Open Source alternative to Litmus

🎯 Best for:Email developers and designers

What is inboxer?

Replaces paid email testing services like Litmus or Email on Acid. Provides local rendering previews for Gmail, Outlook, and Apple Mail to ensure cross-client HTML compatibility.

Tech Stack
RustTesting & QA

Why inboxer?

  • Local rendering
  • Multi-client support
  • Zero cost

Limitations

  • Fewer test clients
  • Manual updates
  • No analytics
4/15/2026
Last Update
0
Forks
0
Issues
MIT
License
Financial Leak Detected

Stop the "SaaS Tax"

Your team could be burning cash. Switching to inboxer instantly boosts your runway.

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

Community Discussion

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