timescale/pg_vectorsearch
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What it is
A PostgreSQL extension providing the PRISM approximate nearest neighbor index, an IVF-style index with a hierarchical centroid tree and RaBitQ quantization. Supports vec32 and vec16 types and pgvector vector and halfvec columns, with L2, inner product and cosine operators…
Who it's for
PostgreSQL developers building vector similarity search over embeddings stored in Postgres
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On Hacker News
- Pg_vectorsearch: An index that is faster than pgvector's IVFFlat and HNSW211 points · 53 comments · 14 Oct 2026
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