Haystack

rag-systems | llm-integration

Overview

Haystack is an open-source NLP framework for building search and question-answering pipelines powered by LLMs. Developed by deepset, it emphasizes composable pipelines with retrievers, readers, and generators.

Key Features

• Pipeline composition: Connect retrievers, rankers, and generators
• Multiple backends: Support for Elasticsearch, FAISS, Pinecone, Weaviate
• OpenAPITool: Call external APIs as pipeline components
• LangChain integration: Can use LangChain components within Haystack

Relationship to Other Projects

• Alternative to LangChain and LlamaIndex for RAG-centric workloads
• Often compared with Haystack as the orchestration layer

References

• GitHub: https://github.com/deepset-ai/haystack
• Website: https://haystack.deepset.ai/