Pyyan / Compare / Atlas Vector Search vs Weaviate
Atlas Vector Search vs Weaviate
2 of 5Vector Databases · verified 13 Aug 2026
Atlas Vector SearchMongoDBcurrent
WeaviateWeaviatecurrent| Specification | Atlas Vector Search | Weaviate |
|---|---|---|
| Summary | Vectors beside the documents they came from. | Hybrid search with batteries included. |
| Index | HNSW | HNSW |
| Hybrid search | Yes | Yes, native |
| Hosting | Managed | Self-host and managed |
| Licence | Proprietary | BSD-3 |
| p50 latency | ~20ms | ~12ms |
| Category | Vector Databases | Vector Databases |
| Official | MongoDB ↗ | Weaviate ↗ |
Highlighted rows are where these differ.
Atlas Vector Search
- No second datastore to keep in sync
- Same argument as pgvector, different database
Best for teams already on MongoDB.
Weaviate
- Vector, BM25 and metadata filters in one query
- Modules for embedding generation built in
Best for hybrid keyword and semantic search.