S4B

pgvector is a PostgreSQL extension that adds vector similarity search to your existing Postgres database. No separate vector database needed — embeddings live alongside your relational data.

• Native PostgreSQL extension — works with existing infrastructure
• Supports IVFFlat and HNSW indexing
• Exact and approximate nearest-neighbor search
• Full SQL: combine vector search with relational queries

Used by teams already running PostgreSQL who want to add RAG or semantic search without introducing a new database. Ideal for keeping embeddings co-located with application data.

Free and open-source (PostgreSQL license). Available on all major managed Postgres services (Supabase, Neon, AWS RDS).

Visit pgvector official website →