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Haystack
NLP framework for building search, question answering, and conversational AI pipelines.
About Haystack
Haystack by deepset is an open source NLP framework for building production-ready LLM applications, retrieval-augmented generation pipelines, and search systems. It provides modular components that can be combined into custom pipelines.
Key Features
✓ Modular pipeline architecture
✓ RAG & semantic search
✓ Multiple LLM integrations
✓ Document stores (Elasticsearch, etc.)
✓ Evaluation framework
✓ REST API for deployment
Why choose Haystack?
Haystack is an open source alternative to LangChain, LlamaIndex. Licensed under Apache-2.0, it gives you full access to the source code and the freedom to modify, self-host, and contribute. It is available as a desktop or web application.