VectorChord

VectorChord is a PostgreSQL extension designed for scalable, high-performance, and disk-efficient vector similarity search. It is entirely based on Postgres storage, enabling effective SSD usage to reduce memory requirements. VectorChord can easily handle vectors ranging from hundreds of millions to multi-billions of entries. It provides the best defaults out-of-the-box so users don't need to tweak quantization or rerank parameters.

GitHub