Vectorchord BM25

VectorChord-BM25 is a specialized extension (or a component of the VectorChord suite) that brings Full-Text Search (FTS) capabilities into the same high-performance framework as its vector search.

While standard VectorChord handles dense vectors (AI-generated embeddings), BM25 (Best Matching 25) is the industry-standard algorithm for sparse keyword search—the kind of search you use when you want to find exact words or phrases. It pairs with pg_tokenizer for tokenization and provides a BM25 index for efficient top-k retrieval.