Arize Phoenix
Phoenix is an open-source platform for building, evaluating, and monitoring AI agents and applications. It provides observability, tracing, and evaluation tools for AI engineering teams.

Phoenix is an open-source platform designed for AI agent development and evaluation. It provides comprehensive observability, tracing, and evaluation tools to help AI engineering teams build, monitor, and improve their AI applications.
Key Features
- AI Agent Development: Build and test AI agents with integrated tracing and debugging tools.
- Observability & Monitoring: Gain deep insights into AI agent performance and behavior.
- Evaluation & Benchmarking: Measure and compare AI agent capabilities with built-in evaluation frameworks.
- Self-Hosting: Deploy Phoenix locally or in your own infrastructure for full control.
- Integration with Coding Agents: Works seamlessly with popular coding agents like Claude, Codex, and Cursor.
- Open-Source: Fully open-source under Apache 2.0 license.
- Enterprise-Grade: Used by Fortune 500 companies for production AI deployments.
Tech / Self-Hosting
Phoenix is open-source and can be self-hosted using Docker, Kubernetes, or directly via CLI. It supports Python and TypeScript SDKs for easy integration with existing AI workflows. Documentation and quick-start guides are available for local setup and production deployment.