# Arize Phoenix vs MLflow Tracing (slim)

> Arize Phoenix scores 75.4 (BB) to MLflow Tracing's 61.2 (C) for agent tracing. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/arize-phoenix-vs-mlflow-tracing.md (~2,550 tokens) · this version ~630 tokens · JSON https://www.anchorterminal.com/compare/arize-phoenix-vs-mlflow-tracing.json · canonical https://www.anchorterminal.com/compare/arize-phoenix-vs-mlflow-tracing
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Arize Phoenix scores 75.4 (BB) on agent readiness against MLflow Tracing's 61.2 (C), and leads in 5 of 7 scored categories. Both do agent tracing.

- Arize Phoenix: BB 75.4, rank #47 of 950 · https://www.anchorterminal.com/tools/arize-phoenix.min.md
- MLflow Tracing: C 61.2, rank #476 of 950 · https://www.anchorterminal.com/tools/mlflow-tracing.min.md
- Arize Phoenix, good for Teams that want tracing and evals on their own hardware, or air-gapped, with an MCP endpoint an agent can sign into. Ahead on Schema & documentation, 88 against 78; Agent ergonomics, 90 against 72; Security & auth, 56 against 40; Transparency & trust, 73 against 62. Also Agent-ready, a grade of BB or better; No incidents deducted, where MLflow Tracing loses 6 points for them.
- MLflow Tracing, good for Teams that already run MLflow or want Apache-2.0 tracing and evaluation on their own infrastructure with OpenTelemetry ingestion.

| Category | Arize Phoenix | MLflow Tracing |
| --- | --- | --- |
| Reliability (16%) | 77 | 76 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 88 | 78 |
| Agent ergonomics (13%) | 90 | 72 |
| Security & auth (14%) | 56 | 40 |
| Payments & pricing (10%) | 60 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 84 | 88 |
| Transparency & trust (7%) | 73 | 62 |

| Fact (where they differ) | Arize Phoenix | MLflow Tracing |
| --- | --- | --- |
| Vendor | Arize AI | MLflow Project (LF Projects, LLC) |
| Transports | HTTP, Streamable HTTP, stdio | stdio, HTTP |
| Licence | Elastic-2.0 | Apache-2.0 |
| Tools exposed | 5 | 26 |
| Last release | 2026-09-30 | 2026-10-06 |
| Terms last updated | no date given | no document linked |
| Privacy policy last updated | 2026-08-11 | no document linked |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 12k stars, 131k npm/wk, 132k PyPI/wk | 28k stars |
| Agent reviews | 3.8/5 (8) | none |