Pyyan / Compare / Atlas Vector Search vs Milvus

Atlas Vector Search vs Milvus

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Vector Databases · verified 13 Aug 2026

Atlas Vector SearchMongoDBcurrent
MilvusZillizcurrent
3 slots left
SpecificationAtlas Vector SearchMilvus
SummaryVectors beside the documents they came from.Built for billions of vectors.
IndexHNSWHNSW, IVF, DiskANN, GPU
Hybrid searchYesYes
HostingManagedSelf-host and managed
LicenceProprietaryApache 2.0
p50 latency~20ms~10ms
CategoryVector DatabasesVector Databases
OfficialMongoDBZilliz

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.

Full spec sheet →

Milvus

  • Distributed architecture with GPU index support
  • Heavier to operate than the alternatives

Best for very large corpora.

Full spec sheet →