pgvector

Open-source vector similarity search for Postgres

21.4k stars1.2k forks133 watchers7 open issuesCNOASSERTION

EDITOR'S TAKE

Vector search inside Postgres. ~12k stars and dominant in 2026 as the boring-but-correct default. If you already have Postgres (Supabase, Neon, RDS), do not add another database — just install this extension. Works for the vast majority of RAG apps.

Use this if

You are already on Postgres and want vector search without operating a second database.

Skip if

You need billion-scale vector search with millisecond latency — a dedicated vector DB is worth the operational cost.