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