Ragas
Measure whether your RAG is any good
LLM / RAG frameworkRAG evaluationApache-2.0Runs locallyPythonIntermediate
🐳 Docker pulls
📦 PyPI downloads / month
📦 npm downloads / month
🚀 Latest release ·
What is Ragas?
Ragas scores RAG pipelines on faithfulness, answer relevance and context precision, turning "it feels better" into numbers.
Why people choose Ragas
- Objective RAG quality metrics
- Catches hallucinations quantitatively
- Integrates with LangChain and LlamaIndex
Ragas at a glance
| Category | LLM / RAG framework |
| Type | RAG evaluation |
| License | Apache-2.0 |
| Runs locally | Yes |
| Built with | Python |
| Skill level | Intermediate |
| Best for | anyone tuning a RAG pipeline blind |
Latest releases
Open-source alternatives to Ragas
Other open-source llm / rag framework tools worth comparing:
LangChainCompose chains, tools and agents
LlamaIndexThe data framework for RAG
HaystackProduction pipelines for search and RAG
DSPyProgram — not prompt — language models
txtaiAll-in-one embeddings database
RAGFlowDeep-document-understanding RAG
Semantic KernelMicrosoft's enterprise agent frameworkGraphRAGRAG that builds a knowledge graph first
LiteLLMOne API for 100+ LLM providers
InstructorReliable structured outputs from LLMs
OutlinesGuarantee valid JSON and grammars
GuidanceInterleave control and generation
LLMWareEnterprise RAG with small specialised models
FlashRankUltra-light reranking for better RAG
Sentence TransformersThe standard way to make embeddings
PromptfooUnit tests for your prompts
LangfuseSee what your LLM app actually did
PhoenixTrace, evaluate and debug LLM appsRagas head-to-head
Ragas vs LangChainRagas vs LlamaIndexRagas vs HaystackRagas vs DSPyRagas vs txtaiRagas vs RAGFlowRagas vs Semantic KernelRagas vs GraphRAGRagas vs LiteLLMRagas vs InstructorRagas vs OutlinesRagas vs GuidanceRagas vs LLMWareRagas vs FlashRankRagas vs Sentence TransformersRagas vs PromptfooRagas vs LangfuseRagas vs Phoenix
FAQ
Is Ragas free?
Ragas is free and open-source (Apache-2.0 license), so you can use, self-host and modify it at no cost.
Can I run Ragas locally?
Yes. Ragas is designed to run on your own machine or server, keeping your data private.
What is the best alternative to Ragas?
Popular open-source alternatives include LangChain, LlamaIndex, Haystack. See the comparisons above to choose.
Explore more open-source AI
Browse the full directory of open-source AI tools, models and projects — updated daily.
Browse all tools →