Architecture comparison
Data Platform
Lakehouse deployed into the customer's own cloud (AWS/Azure/GCP), built on open Spark + Delta Lake. Ships its own open model DBRX and the Mosaic AI training/serving stack.
Database
Atlas runs the MongoDB document database as a managed service across AWS, Azure and GCP. Atlas Vector Search makes it a RAG datastore; AI features integrate partner LLMs rather than a captive model.