Vespa

Pinecone

pinecone.io

Popular

Fully managed serverless vector database; the most common managed choice for production RAG.

pgvector

pgvector/pgvector

Popular

PostgreSQL extension for vector similarity search with HNSW and IVFFlat indexes; vectors next to your data.

Qdrant

qdrant/qdrant

Popular

Rust vector database with rich payload filtering, quantization and hybrid search; self-hosted or cloud.

Chroma

chroma-core/chroma

Popular

Developer-friendly open-source embedding database, the default for prototyping RAG locally.

Weaviate

weaviate/weaviate

Open-source vector database with built-in vectorizers, hybrid BM25+vector search and multi-tenancy.

Milvus

milvus-io/milvus

Cloud-native vector database built for billion-scale similarity search, with Zilliz Cloud as managed option.

Faiss

facebookresearch/faiss

Popular

Meta's library for efficient similarity search and clustering of dense vectors on CPU and GPU.

LanceDB

lancedb/lancedb

Rising

Embedded, serverless vector database on the Lance columnar format, built for multimodal AI data.

turbopuffer

turbopuffer.com

Rising

Serverless vector and full-text search on object storage, used by Cursor, Notion and Linear for cheap scale.