Haystack

Production pipelines for search and RAG
LLM / RAG frameworkNLP / RAG frameworkApache-2.0Cloud-optionalPythonIntermediate
🛡 Published security advisories
A high count usually means the project is heavily examined. A low count usually means it is little examined — not that it is safe.
No public activity signals for this tool — it has no open repository we can measure.
OSAI Pulse ⓘ ★★★★★★★★★★ /100 signals tracked
🐳 Docker pulls 📦 PyPI downloads / month 📦 npm downloads / month 🚀 Latest release ·
Visit website →View on GitHub

What is Haystack?

Haystack by deepset is a production-oriented framework for building search and RAG pipelines with a clear, composable component model.

Why people choose Haystack

Haystack at a glance

CategoryLLM / RAG framework
TypeNLP / RAG framework
LicenseApache-2.0
Runs locallyCloud-optional
Built withPython
Skill levelIntermediate
Best forteams wanting production search pipelines

Open-source alternatives to Haystack

Other open-source llm / rag framework tools worth comparing:

LangChainCompose chains, tools and agentsLlamaIndexThe data framework for RAGDSPyProgram — not prompt — language modelstxtaiAll-in-one embeddings databaseRAGFlowDeep-document-understanding RAGSemantic KernelMicrosoft's enterprise agent frameworkGraphRAGRAG that builds a knowledge graph firstLiteLLMOne API for 100+ LLM providersInstructorReliable structured outputs from LLMsOutlinesGuarantee valid JSON and grammarsGuidanceInterleave control and generationLLMWareEnterprise RAG with small specialised modelsFlashRankUltra-light reranking for better RAGSentence TransformersThe standard way to make embeddingsRagasMeasure whether your RAG is any goodPromptfooUnit tests for your promptsLangfuseSee what your LLM app actually didPhoenixTrace, evaluate and debug LLM apps

Haystack head-to-head

Haystack vs LangChainHaystack vs LlamaIndexHaystack vs DSPyHaystack vs txtaiHaystack vs RAGFlowHaystack vs Semantic KernelHaystack vs GraphRAGHaystack vs LiteLLMHaystack vs InstructorHaystack vs OutlinesHaystack vs GuidanceHaystack vs LLMWareHaystack vs FlashRankHaystack vs Sentence TransformersHaystack vs RagasHaystack vs PromptfooHaystack vs LangfuseHaystack vs Phoenix

FAQ

Is Haystack free?

Haystack is free and open-source (Apache-2.0 license), so you can use, self-host and modify it at no cost.

Can I run Haystack locally?

Haystack can be used locally or in the cloud depending on your setup.

What is the best alternative to Haystack?

Popular open-source alternatives include LangChain, LlamaIndex, DSPy. 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 →