MongoDB vs PostgreSQL

The database for when you want to store JSON and pretend it's a schema meets the database that actually respects your data, with more features than you'll ever need but you'll love having them anyway. Here's our take.

MongoDB

Nice Pick

The database for when you want to store JSON and pretend it's a schema.

Pros

• Flexible schema allows rapid prototyping and iteration
• Native JSON-like document storage fits well with modern web apps
• Horizontal scaling with sharding is straightforward
• Aggregation pipeline is powerful for complex queries

Cons

• Lack of enforced schema can lead to messy data over time
• Joins are clunky compared to relational databases

PostgreSQL

The database that actually respects your data, with more features than you'll ever need but you'll love having them anyway.

Pros

• Rock-solid ACID compliance and transactional integrity
• Rich set of built-in data types including JSON, arrays, and custom types
• Excellent performance with advanced indexing options like GIN and GiST
• Strong community support and extensive documentation

Cons

• Configuration can be complex and overwhelming for beginners
• Memory usage tends to be higher compared to some other databases

The Verdict

Use MongoDB if: You want flexible schema allows rapid prototyping and iteration and can live with lack of enforced schema can lead to messy data over time.

Use PostgreSQL if: You prioritize rock-solid acid compliance and transactional integrity over what MongoDB offers.

The Bottom Line

MongoDB wins

The database for when you want to store JSON and pretend it's a schema.