LanceDB

LanceDB is an open-source vector database designed as a 'multimodal lakehouse': it stores vectors alongside text, images, video, and metadata in the Lance columnar format, and serves vector similarity, full-text, and SQL search from one engine. It runs embedded (no server) or at cloud scale, with zero-copy versioning of datasets. Python, TypeScript, and Rust SDKs plus LangChain/LlamaIndex integrations make it a drop-in vector store for RAG and agent pipelines; the company also sells a managed cloud tier.

```bash

pip install lancedb

```

```python

import lancedb

db = lancedb.connect("/tmp/db") # embedded, no server

table = db.create_table("docs", data=[{"id": 1, "vector": [0.1, 0.2]}])

result = table.search([0.1, 0.2]).limit(5).to_pandas()

```

See the quickstart at docs.lancedb.com. Managed cloud available at lancedb.com for production scale.