Arize Phoenix
Arize's source-available platform for tracing, evaluating and debugging LLM applications, which you can run yourself.
About Arize Phoenix
Debugging LLM apps needs visibility into each call, retrieval and tool step.
Who it’s for
- Developers debugging LLM and RAG apps
- Teams that want self-hosted observability
When to consider it
Consider Phoenix when you want to self-host tracing and evals, with a path to Arize's managed platform.
Tradeoffs & limitations
- Licensed under the Elastic License 2.0, which makes the source available but is not an OSI open-source license.
SOTA overview · Documentation-based assessment · Sources & review method
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Comparisons & guides
Sources & review method
Documentation-based assessment · Oct 2, 2026 · Prepared with AI assistance; not a hands-on benchmark.
Checked by SOTA · AI-assisted documentation review. Selection advice is our assessment; verify current requirements for your deployment.
Import history & original evidence
Arize Phoenix on GitHub
Arize's source-available platform for tracing, evaluating and debugging LLM applications, which you can run yourself.
Based on official pages and announcements checked on 2026-10-02. No hands-on test, performance benchmark or popularity ranking is claimed.