MongoDB vs PostgreSQL: Key Differences & When to Use Each

Comprehensive side-by-side comparison of features, pricing, and metrics

Key Differences

Compare MongoDB and PostgreSQL across features, pricing, integrations, and community metrics. MongoDB / PostgreSQL.

Feature

MongoDB

Database

PostgreSQL

Database

Side-by-side comparison of developer tools
NoSQL document database
Advanced open source relational database
GitHub Stars
⭐ 28,519
⭐ 21,942
Contributors
👥 1,487
👥 58
Pricing
✓ Free
Enterprise: Contact sales
✓ Free
Enterprise: Contact sales
Languages
C++
C
Features
  • • C Plus Plus
  • • Database
  • • Mongodb
  • • Nosql
  • • Open Source
  • • database
Integrations
  • • mongodb
  • • postgresql
Momentum Score
71/100 (stable)
28/100 (slowing)
Community Health
81/100 (good)
20/100 (needs-attention)
Maturity Index
70/100 (established)
23/100 (experimental)
Innovation Score
58/100 (progressive)
18/100 (traditional)
Risk Score (higher is safer)
75/100 (minimal)
14/100 (high)
Developer Experience
53/100 (needs-improvement)
13/100 (poor)
Links
🌐 Visit Website View on GitHub
🌐 Visit Website View on GitHub

MongoDB Strengths

  • ✓ More popular (28,519 stars)
  • ✓ Larger community (1,487 contributors)
  • ✓ More features (4 listed)

PostgreSQL Strengths

When to Use MongoDB vs PostgreSQL

Use MongoDB when its strengths align better with your stack and team needs, and choose PostgreSQL when its ecosystem, integrations, or cost profile is a better fit.

Related comparisons

MongoDB vs Elasticsearch → PostgreSQL vs Elasticsearch → MongoDB vs Redis → PostgreSQL vs Redis → MongoDB vs ClickHouse → PostgreSQL vs ClickHouse → MongoDB vs TiDB → PostgreSQL vs TiDB → MongoDB vs CockroachDB → PostgreSQL vs CockroachDB → MongoDB vs InfluxDB → PostgreSQL vs InfluxDB →

More Comparisons

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Data source: GitHub API

Last updated: 8/30/2026