A side-by-side of two vector databases for building AI agents — live GitHub data, languages, and what each is best at.
| Milvus | pgvector | |
|---|---|---|
| GitHub stars | ★ 45k | ★ 22k |
| Language | Go | C |
| Category | Vector databases | Vector databases |
| Best for | billion-scale search | RAG on existing Postgres |
| Repository | milvus-io/milvus | pgvector/pgvector |
Milvus and pgvector are both credible choices. By community traction, Milvus leads (★ 45k). Pick Milvus for billion-scale search; pick pgvector for RAG on existing Postgres.
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