RAG

Pinecone

Featured

RAG · Hosted vector DB (not an LLM)

8.8

Managed vector database for production-scale similarity search.

LlamaIndex

Featured

RAG · BYO (Claude / GPT / open)

8.7

Data framework for connecting LLMs to your data.

Elasticsearch Vector Search

RAG · BYO embeddings (OpenAI, Cohere, Hugging Face, Mistral, Bedrock, Vertex, Azure) plus Elastic's built-in ELSER sparse model and E5 dense model

8.7

Hybrid vector + keyword search in the enterprise-grade Elasticsearch engine

Snowflake Cortex

RAG · Anthropic Claude, Meta Llama, Mistral Large 2, Snowflake Arctic

8.7

Generative AI and RAG built into the Snowflake data cloud

DataStax Astra DB

RAG · Bring-your-own embeddings; integrates with OpenAI, Cohere, Hugging Face, Mistral, NVIDIA NIM, and Vertex AI via server-side vectorize

8.6

Serverless vector and document database for production RAG and AI agents

MongoDB Atlas Vector Search

RAG · Bring-your-own embeddings (OpenAI, Cohere, open models); native Voyage AI embeddings and rerankers

8.6

Vector search built into the operational database you're already using.

Quivr

RAG · Multi-model (OpenAI, Anthropic, Mistral, Gemma)

8.4

Open-source RAG framework for building custom AI assistants over your own documents in a few lines of Python.

Weaviate

RAG · Hosted vector DB (not an LLM)

8.4

Open-source vector DB with hybrid search and modules.

LangChain

RAG · BYO (any major LLM)

8.3

The broad LLM application framework — chains, agents, retrievers.

Vanna.ai

RAG · Multi-model (Anthropic, OpenAI, Gemini, Ollama)

8.3

Open-source text-to-SQL agent that learns your schema and writes queries against your real warehouse.

Feast

RAG

8.2

Open-source feature store that serves consistent features to ML training and online inference, with RAG vector search built in.

LanceDB

RAG

8.2

Open-source multimodal lakehouse and vector database built for AI training and retrieval at petabyte scale.

Scite

RAG · Multi-model

8.2

AI research assistant that grades citations as supporting, contrasting, or mentioning across 1.6B citation statements.

Vespa

RAG · Hosted search engine (not an LLM)

8.2

Yahoo's open-source search engine with vector + sparse retrieval.

Chroma

RAG · Hosted vector DB (not an LLM)

8.1

Embedded, developer-friendly vector store for Python.

Cube

RAG · Multi-model

8.1

Semantic layer that grounds LLM agents in your real business metrics instead of letting them hallucinate SQL.

Databricks Vector Search

RAG · Multi-model (BYO embeddings or Databricks-hosted)

8.1

Managed hybrid vector search that lives inside the Databricks lakehouse and auto-syncs with your source tables.

NotebookLM

RAG · Gemini 2.5

8.1

Google's source-grounded research notebook that turns your documents into chats, briefs, and AI-hosted podcasts.

RAGFlow

RAG · Multi-model

8.1

Open-source RAG engine with deep document parsing, hybrid search, and visual agent orchestration.

Exa

RAG · Proprietary neural + keyword search

8.0

Web search API built for AI agents, with structured outputs and token-efficient highlights.

Firecrawl

RAG · Claude, Cursor, Windsurf, OpenAI, Gemini

8.0

Web scraping and crawling API that returns LLM-ready markdown, JSON, or structured data from any URL.

Wren AI

RAG · Multi-model (OpenAI, Anthropic, Gemini, self-hosted)

8.0

Open-source GenBI semantic layer that lets AI agents query your warehouse in natural language with governed, accurate SQL.

AnythingLLM

RAG · Multi-model

7.9

Open-source desktop and self-hosted app that turns your documents into a private chat-and-agent workspace.

Humata.ai

RAG · Multi-model

7.8

Chat-with-your-documents RAG tool with citation-backed answers across uploaded PDFs and files.