RAGAS (Retrieval Augmented Generation Assessment) is the standard evaluation framework for RAG pipelines. With 14K+ GitHub stars, it provides metrics that identify exactly where a RAG system underperforms, while its README discloses minimal anonymized Open Analytics with an opt-out via RAGAS_DO_NOT_TRACK=true.
Four core metrics cover the full RAG pipeline: faithfulness measures whether answers are grounded in retrieved context, answer relevancy scores response quality, context precision evaluates retrieval accuracy, and context recall measures retrieval completeness.
The framework-agnostic design works with any RAG implementation and supports any LLM as the evaluation judge. Synthetic test data generation creates evaluation datasets automatically from documents, reducing the manual effort of building test suites.
RAGAS integrates with LangChain, LlamaIndex, and evaluation platforms like Langfuse and Braintrust. CI/CD integration enables automated regression testing to catch quality degradation when changing retrieval strategies, chunking approaches, or LLM models.
