MongoDB Atlas vs PostgreSQL

At a Glance

Attribute	MongoDB Atlas	PostgreSQL
Category	Database	Database
Pricing Model	freemium	open-source
Starting Price	Free / $57/mo	Free
Free Tier	Yes	Yes
Open Source	No	Yes
Platforms	aws, gcp, azure	linux, macos, windows, containers

MongoDB Atlas

PostgreSQL

MongoDB Atlas

PostgreSQL

MongoDB Atlas

Pros

The flexible document model means you can iterate on your data shape in early product development without migrations+132
Atlas Search gives you full-text search with relevance ranking built directly into your database without a separate service+118
The aggregation pipeline is incredibly powerful once you learn it — complex transformations that would require joins in SQL are often one pipeline stage+104
Global clusters with regional reads and writes let you build truly multi-region apps without managing replication yourself+89

Cons

Schema-less sounds great until you have inconsistent data across millions of documents and no enforcement to help you find the problem

Database

MongoDB Atlas vs Supabase

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