DataStax Astra DB alternatives

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

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.