Phoenix
Open source AI development platform for monitoring and improving AI quality.
- Freemium· from $50/month
- API Available
- Open Source
What is Phoenix?
Phoenix is a ML Development tool. Open source AI development platform for monitoring and improving AI quality. Phoenix is freemium: it has a free plan, and paid plans start at $50/month. It is aimed at ai engineers and fortune 500 companies.
Phoenix is an open-source platform for ML observability, enabling users to monitor and refine LLM, CV, and tabular models. It provides tools for testing changes with evidence and improving agent quality through systematic approaches.
Built for ai engineers and fortune 500 companies.
Key capabilities
Features
Measure And Improve Agent Quality
Test Changes With Evidence
Agent Native
Systematic Way To Improve AI Quality
Deploy Anywhere In Seconds
Engineers For Builders
Public API
Use cases
- Monitor and refine LLM, CV, and tabular models
- Test changes with evidence-based approaches
- Measure and improve agent quality systematically
- Deploy AI models anywhere in seconds
- Integrate with OpenAI and LangChain for enhanced functionality
- Use public API for custom integrations and automation
Who it's for
- AI Engineers
- Fortune 500 Companies
Pros & cons
Pros
- Public API available
- Free plan available
- Paid plans from USD 50/month
Cons
No documented limitations yet.
Pricing
Freemium — paid plans start at $50/month.
| Plan | Price |
|---|---|
| Pro | $50 / month |
| Free | Free |
Developer & API
Public SDK API available
- Authentication
- API Key
- SDKs
- TypeScript SDK, Python SDK, -g, Python, TypeScript
Open source· 11.7K stars· 1.2K forks
Security & compliance
- SOC 2
- ISO 27001
- GDPR
- HIPAA
- SSO
- Data deletion
As stated on Phoenix's website — not independently verified by AiByts.
FAQ
What is Phoenix?
Phoenix is a ML Development tool. Open source AI development platform for monitoring and improving AI quality. Phoenix is an open-source platform for ML observability, enabling users to monitor and refine LLM, CV, and tabular models. It provides tools for testing changes with evidence and improving agent quality through systematic approaches.
Is Phoenix free?
Phoenix has a free plan; advanced features require a paid plan.
How much does Phoenix cost?
Phoenix offers 2 plans: Pro ($50 / month) and Free (Free).
Does Phoenix have an API?
Yes, Phoenix offers a public SDK API for building custom integrations.
Who should use Phoenix?
Phoenix is built for ai engineers and fortune 500 companies. Common uses: monitor and refine LLM, CV, and tabular models, test changes with evidence-based approaches, measure and improve agent quality systematically and deploy AI models anywhere in seconds.
What does Phoenix integrate with?
Phoenix integrates with OpenAI and LangChain.
Is Phoenix open source?
Yes, Phoenix is open source.
Phoenix news & updates
Details are compiled from Phoenix's website and public sources, last verified Oct 3, 2026. Features and pricing change — confirm on the official site before you buy.
Try Phoenix
Freemium · from $50/month
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