Why Phoenix?

Fully Open-Source & Developed in the Open

Phoenix is an open-source platform designed with privacy and customizability in mind. The Phoenix application can be self-hosted and run entirely on your local machine or in a container, or accessed through a free cloud instance on our website.

All development processes, including go-to-market and operations tickets, are public on GitHub. We encourage and celebrate contributions from the community. We want making Phoenix to be a true collaborative effort.

Built on OpenTelemetry

Phoenix is powered by OpenTelemetry protocols, the industry-standard, battle-tested library for observability. This means that any code you write to instrument Phoenix will be reusable across dozens of other platforms. We want you to stay with Phoenix long-term because it’s the best AI observability platform available, not due to technical debt.

The Phoenix team is also actively working with the OpenTelemetry team to help shape the framework’s evolution.

Comprehensive Feature Set

Phoenix covers everything you need to build, evaluate and productionize LLM applications.

• Tracing: Offers in-depth visibility into system behavior.
• Evaluation: Helps measure and optimize model performance.
• Experimentation: Facilitates testing and comparing different approaches.
• Dataset Management: Simplifies handling datasets for AI workflows.
• Prompt Iteration: Supports refining and managing LLM prompts.
• Multiple Deployment Options: Provides a range of deployment options, from on-demand cloud instances, to Docker containers, to simply running phoenix serve on your local machine.

With integrations for over 20 frameworks, including OpenAI, LangChain, LlamaIndex, Anthropic, DSPy, Groq, and Vercel AI SDK,  as well as manual implementation options, Phoenix fits into all existing workflows.

Framework Agnostic

Phoenix treats all its integrations equally. We’re framework, model, and tool agnostic, meaning you can easily swap your approach at any point. And because we’re built on OpenTelemetry, an open standard, even your observability instrumentation isn’t locked to Phoenix.

Phoenix Grows with You

Phoenix is designed as a comprehensive observability platform, but for organizations with more advanced needs, Arize provides an enterprise platform. This includes expanded AI-powered features, dedicated support, and tools for ML and CV observability.

The enterprise platform is built to scale, capable of managing billions of requests daily, offering a seamless transition for teams ready to take their observability to the next level.

Arize is a four-year-old Series B company backed by TCV, Battery Ventures, and Foundation Capital, and is led by experienced founders with successful prior ventures.

Phoenix will always remain free, open-source, and built by AI engineers for AI engineers.