Pyyan / Compare / pgvector vs Weaviate
pgvector vs Weaviate
2 of 5Vector Databases · verified 13 Aug 2026
pgvectorPostgreSQLcurrent
WeaviateWeaviatecurrent| Specification | pgvector | Weaviate |
|---|---|---|
| Summary | Vectors inside the database you already run. | Hybrid search with batteries included. |
| Index | HNSW, IVFFlat | HNSW |
| Hybrid search | Yes, with SQL | Yes, native |
| Hosting | Self-host or any managed Postgres | Self-host and managed |
| Licence | PostgreSQL | BSD-3 |
| p50 latency | ~15ms | ~12ms |
| Category | Vector Databases | Vector Databases |
| Official | PostgreSQL ↗ | Weaviate ↗ |
Highlighted rows are where these differ.
pgvector
- One database for vectors, rows and joins
- The honest default: reach for something else only when this stops working
Best for almost everyone, until scale says otherwise.
Weaviate
- Vector, BM25 and metadata filters in one query
- Modules for embedding generation built in
Best for hybrid keyword and semantic search.