Ragas vs 
Phoenix
Ragas vs Phoenix compared for 2026 — features, license, ease of use, performance and which one to choose. Measure whether your RAG is any good vs Trace, evaluate and debug LLM apps.
Updated regularly · curated by OpenSourceAI.tech
Ragas vs Phoenix at a glance
| Spec | Ragas | Phoenix |
|---|---|---|
| Category | LLM / RAG framework | LLM / RAG framework |
| Type | RAG evaluation | LLM observability |
| License | Apache-2.0 | Elastic-2.0 |
| Runs locally | Yes | Yes |
| Primary language | Python | Python |
| Ease of use | Intermediate | Intermediate |
| Best for | anyone tuning a RAG pipeline blind | finding why a RAG pipeline fails |
| GitHub stars | — | 10.6k |
How Ragas and Phoenix score
| Criterion | Ragas | Phoenix |
|---|---|---|
| Popularity | n/a | 3.0 |
| Maintenance | n/a | 5.0 |
| Ease of use | 3.5 | 3.5 |
| Privacy | 5.0 | 5.0 |
| License freedom | 5.0 | 3.5 |
Scores are computed automatically from public signals — GitHub stars (popularity), recent commit activity (maintenance), license type (freedom), local-first design (privacy) and onboarding complexity (ease of use). Indicative, not a verdict.
What each one is
Ragas
Ragas scores RAG pipelines on faithfulness, answer relevance and context precision, turning "it feels better" into numbers.
- Objective RAG quality metrics
- Catches hallucinations quantitatively
- Integrates with LangChain and LlamaIndex
Phoenix
Phoenix from Arize traces LLM applications, surfaces failure clusters and runs evaluations, all runnable locally in a notebook or as a server.
- Runs locally, even in a notebook
- Clusters failures to find patterns
- Built-in LLM evaluators
Key differences
Ragas is rAG evaluation, while Phoenix is lLM observability. Their licenses differ (Apache-2.0 vs Elastic-2.0), which matters if you ship a commercial product. In short, Ragas fits anyone tuning a RAG pipeline blind, and Phoenix fits finding why a RAG pipeline fails.
Which should you choose?
Choose Ragas for anyone tuning a RAG pipeline blind. Choose Phoenix for finding why a RAG pipeline fails.
There is rarely one winner — many setups use both. The right pick depends on your hardware, your team's skills, and whether you value simplicity or control.
Frequently asked questions
Is Ragas or Phoenix easier to use?
Both sit at a similar level (Intermediate). Your choice should come down to fit rather than difficulty.
Are Ragas and Phoenix free?
Ragas is free and open source (Apache-2.0), and Phoenix is free and open source (Elastic-2.0). Neither charges for the core software.
Can I run Ragas and Phoenix locally?
Ragas: yes · Phoenix: yes. Both can be used without sending your data to a third-party cloud where their setup allows.
Ragas vs Phoenix — which should I pick in 2026?
Choose Ragas for anyone tuning a RAG pipeline blind. Choose Phoenix for finding why a RAG pipeline fails.
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