A side-by-side of two vector databases for building AI agents — live GitHub data, languages, and what each is best at.
| pgvector | Weaviate | |
|---|---|---|
| GitHub stars | ★ 22k | ★ 16k |
| Language | C | Go |
| Category | Vector databases | Vector databases |
| Best for | RAG on existing Postgres | hybrid search |
| Repository | pgvector/pgvector | weaviate/weaviate |
pgvector and Weaviate are both credible choices. By community traction, pgvector leads (★ 22k). Pick pgvector for RAG on existing Postgres; pick Weaviate for hybrid search.
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