Arize Phoenix

Open-source tracing and evals for AI agents

Observability for LLM apps built on OpenTelemetry

Open-source evaluation and tracking for LLM experiments

Open-source observability and cost tracking for LLM APIs

Comet's open-source LLM tracing and evaluation suite

LangChain's platform for debugging and evaluating LLM apps

Open-source LLM observability and tracing

Evaluation and observability for AI apps in production