Arize Phoenix

Open-source LLM tracing, evaluation, and observability built on OpenTelemetry with no lock-in.

PlatformWebfreeglobal

An open-source, self-hostable platform that provides tracing, evaluation, and observability for LLM applications using OpenTelemetry. It helps AI engineers and data scientists collect instrumented app data, iterate prompts and models in a sandbox, run pre-built or custom evaluations with human feedback, and analyze embeddings to diagnose problematic outputs without vendor lock-in.

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Full match profile

Behind the summary, Matchbox keeps a richer profile of Arize Phoenix - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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