# Opik vs Phoenix

## Key differences

- Opik has 1.9× as many GitHub stars as Phoenix (22.4K vs 11.7K).
- Opik had more development activity over the last 12 months: 4,323 commits vs 3,725.
- Opik is downloaded 2.9× as often on PyPI (424.8K vs 145.1K per week).
- Opik is licensed under Apache-2.0; Phoenix under Elastic-2.0.

| | Opik | Phoenix |
|---|---|---|
| Description | Formerly CometLLM. Debug, evaluate, and monitor LLM applications with tracing and dashboards. | ML observability in a notebook with UMAP visualizations |
| GitHub stars | 22,373 | 11,704 |
| Commits (12 months) | 4,323 | 3,725 |
| Contributors | 159 | 235 |
| License | Apache-2.0 | Elastic-2.0 |
| Language | Python | Python |
| Status | Active | Active |
| Install | `pip install opik` | `pip install arize-phoenix` |

Source: https://awesomedataviz.com/compare/opik-vs-phoenix/ · Data updated 2026-10-04 · Content: CC BY 4.0, Awesome Dataviz (https://awesomedataviz.com).