Pyyan / Compare / Atlas Vector Search vs pgvector
Vector Databases · verified 13 Aug 2026
| Specification | Atlas Vector Search | pgvector |
|---|---|---|
| Summary | Vectors beside the documents they came from. | Vectors inside the database you already run. |
| Index | HNSW | HNSW, IVFFlat |
| Hybrid search | Yes | Yes, with SQL |
| Hosting | Managed | Self-host or any managed Postgres |
| Licence | Proprietary | PostgreSQL |
| p50 latency | ~20ms | ~15ms |
| Category | Vector Databases | Vector Databases |
| Official | MongoDB ↗ | PostgreSQL ↗ |
Highlighted rows are where these differ.
Best for teams already on MongoDB.
Best for almost everyone, until scale says otherwise.