Haystack
Haystack is an open-source Python framework for building custom LLM applications like RAG and semantic search.
FreeWebAPICLIOpen sourceKoreanLLM-basedMultimodal
Visit websitehaystack.deepset.ai
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Haystack is an open-source Python framework for building custom LLM applications like RAG and semantic search. It features a modular pipeline architecture that allows developers to connect various document stores, embedding models, and LLMs seamlessly. With the release of Haystack 2.0, it offers a more intuitive component-based design, making it ideal for building production-ready AI systems with high scalability.
Key features
- Modular Pipeline Design
- RAG Support
- Vector DB Integration
- Custom Component Creation
- Visual Pipeline Debugging
- Multimodal Support
- Data Preprocessing Tools
Pricing
Use cases
- Enterprise Knowledge Base
- Semantic Search Engine
- Automated Q&A Systems
- Document Summarization
Who it is for
AI EngineersData scientistsBackend Developers
Integrations
ElasticsearchPineconeHugging FaceOpenAILangSmith
Tags
RAG
How we verified this
Company, pricing, and feature details come from the primary sources below and our latest verification pass. When sources disagree, the official source and the most recent check win.
Last verified 08/30/2026Verified sources: 1
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