Comparison · Databases

MongoDB vs
PostgreSQL.

PostgreSQL has gained the document features that used to make MongoDB attractive (JSONB) without losing relational power. For most apps, it's the right default.

Vedwix verdict
Default to PostgreSQL
When each wins · 01

Pick by use case.

When MongoDB wins

MongoDB

Document-shaped data, very high write throughput, schema-fluid early stage.

When PostgreSQL wins

PostgreSQL

Almost everything else.

Feature-by-feature · 02

Direct comparison.

FeatureMongoDBPostgreSQL
Schema enforcementOptionalStrict (good)
JoinsAwkwardNative
JSON / documentNativeJSONB (excellent)
EcosystemSmallerMassive
Extension richnessLimitedpgvector, pgcron, etc.
MigrationsEventual consistencyTransactional
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Vedwix take · 03

Our take.

PostgreSQL for any project starting today. Mongo when you have very specific document patterns and write-heavy scale.

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