10 open-source vector DBs for AI agents, from Milvus to sqlite-vec
victor_explore · x · 2026-10-29
A curated GitHub roundup of open-source vector databases for agent memory and similarity search (star counts from Oct 2026):
- Milvus (64k★): big vector DB for billions of embeddings
- FAISS (41k★): Meta's GPU-accelerated similarity search library
- Qdrant (35k★): Rust vector DB with strong filtering
- Chroma (29k★): pip-install-and-go simplicity
- pgvector (25k★): vector search inside Postgres, alongside your data
- Weaviate (17k★): native hybrid search with built-in embeddings
- zvec (16k★): Alibaba's in-process, serverless vector DB
- txtai (13k★): all-in-one framework with RAG and agents
- LanceDB (12k★): embedded vector DB on files or S3
- sqlite-vec (8k★): tiny SQLite vector-search extension that runs anywhere
Covers everything from embedded in-process options to distributed scale-out, pick by workload size and deployment style.
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