pgvector is a PostgreSQL extension that adds vector similarity search to your existing database, so you can do RAG without a separate vector store.
From the README
docker pull pgvector/pgvector:pg18-trixie
- exact and approximate nearest neighbor search
- single-precision, half-precision, binary, and sparse vectors
- L2 distance, inner product, cosine distance, L1 distance, Hamming distance, and Jaccard distance
Excerpts from the project README on GitHub. Copyright and licensing remain with the respective authors.
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Free · no card · unsubscribe anytimeOpen-source vector similarity search for Postgres
pgvector has 22.8k stars on GitHub. It has been forked 1.3k times. pgvector is written mainly in C. It has been in active development since 2021. Its main topics are approximate-nearest-neighbor-search, nearest-neighbor-search.
Read the full guideWhat is pgvector?
Open-source vector similarity search for Postgres
Is pgvector open source?
pgvector is an open-source project.
Is pgvector free?
Yes. pgvector is free and open source — you can use, modify and self-host it.
What language is pgvector written in?
pgvector is written mainly in C.
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