A side-by-side of two vector databases for building AI agents — live GitHub data, languages, and what each is best at.
| pgvector | Chroma | |
|---|---|---|
| GitHub stars | ★ 22k | ★ 29k |
| Language | C | Rust |
| Category | Vector databases | Vector databases |
| Best for | RAG on existing Postgres | RAG |
| Repository | pgvector/pgvector | chroma-core/chroma |
pgvector and Chroma are both credible choices. By community traction, Chroma leads (★ 29k). Pick pgvector for RAG on existing Postgres; pick Chroma for RAG.
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