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AI for RAG

Retrieval-augmented generation stacks and vector search.

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1LlamaIndex

Python RAG framework — connect LLMs to 160+ data sources with production-grade retrieval pipelines

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2LangChain

Open-source LLM application framework — chains, agents, RAG, and 700+ integrations with 127K GitHub stars

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3Haystack

Open-source LLM framework for RAG and NLP pipelines — production-ready by deepset

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4Pinecone

Managed vector database for production AI apps — serverless and low-latency

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5Weaviate

Open-source vector database — hybrid search, multi-tenancy, and native LLM module integrations for RAG

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6Chroma

Open-source embedding database for LLM apps — start in 3 lines of Python

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7Qdrant

High-performance open-source vector database built in Rust

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8LanceDB

Embedded vector database for AI — serverless, columnar storage with Lance format

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9Milvus

Open-source vector database for billion-scale AI applications

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10Voyage AI

State-of-the-art embedding and reranking models — domain-specific retrieval APIs

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See also