What Arize Phoenix AI does
Arize Phoenix is an open-source tool for tracing, evaluating, and improving AI agents and LLM applications, built for AI engineers and developers. Named features include tracing of prompts, retrievals, tool calls, and outputs, annotations from human review or LLM-as-judge, datasets and experiments, evaluations, and a Prompt IDE. Phoenix can run locally or be self-hosted with Docker or Kubernetes, and it has native OpenTelemetry support under the ELv2 license. The page says you can start free with no credit card and links to a separate pricing page for details.
How Arize Phoenix AI compares with its closest alternatives
All 5 closest alternatives have a free plan, as Arize Phoenix AI does. Only Gumloop lists a starting price, $97 a month. All 5 offer an API, as Arize Phoenix AI does. Arize Phoenix AI offers a web app. Of the 4 alternatives with platforms on record, all 4 offer a web app. Arize Phoenix AI was founded in 2023; the alternatives were founded between 2022 and 2024, 3 of them earlier. The alternatives with a known headquarters are in the United States and France.