pgvector
An open-source extension that adds vector similarity search to PostgreSQL, so a normal Postgres database can store embeddings and power semantic search / RAG.
pgvector is a PostgreSQL extension that lets a standard Postgres database store embeddings and run nearest-neighbour similarity search. It turns Postgres into a vector database without adding a separate system.
For teams that already run Postgres, pgvector is a popular way to build RAG over transcripts — including on-prem — because it keeps the vector store inside infrastructure they already operate and control.