Ragas

Overview

Ragas is a Python framework for evaluating LLM applications through automated metrics and test generation. It measures retrieval quality, generation accuracy, and end-to-end performance without requiring manual ground truth labels. Designed for RAG systems and LLM pipelines, it provides quantitative feedback on application behavior.

Best for

Best for
Teams building RAG systems who need continuous evaluation without manual labeling

Use cases

• Measuring retrieval quality in RAG systems
• Benchmarking LLM output accuracy and relevance
• Automated test generation for prompt chains

Notes

Ragas is a Python framework for evaluating LLM applications through automated metrics and test generation. It measures retrieval quality, generation accuracy, and end-to-end performance without requiring manual ground truth labels. Designed for RAG systems and LLM pipelines, it provides quantitative feedback on application behavior.

14,186 stars on GitHub. Last updated 2026-02-24. Licensed Apache-2.0.

Use cases

• Measuring retrieval quality in RAG systems
• Benchmarking LLM output accuracy and relevance
• Automated test generation for prompt chains

Pros

• Reduces evaluation overhead by automating metric computation
• Works without pre-built ground truth datasets
• Active open source community with 14k+ stars

Cons

• Metrics depend on LLM quality, introducing circular dependencies
• Python-only, requires integration into existing workflows
• Automated metrics may not capture domain-specific correctness

Indexed from awesome-llm and enriched against its public facts.