phoenix

The premium Open Source alternative to LangSmith

🎯 Best for:Teams needing deep LLM observability without data leaving their VPC.

What is phoenix?

Replaces closed-source observability tools with a notebook-first platform for LLM tracing. It enables deep evaluation of embeddings and retrieval performance within local environments.

Tech Stack
Jupyter NotebookMonitoring & Logs

Why phoenix?

  • OpenInference support
  • Embedding visualization
  • Local-first architecture

Limitations

  • Resource intensive
  • Basic UI design
  • Complex Arize integration
3/6/2026
Last Update
738
Forks
407
Issues
Other
License
Financial Leak Detected

Stop the "SaaS Tax"

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

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

Community Discussion

Comments