Cassandra vs MongoDB: Key Differences & When to Use Each

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

Key Differences

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

Feature

Cassandra

Database

MongoDB

Database

Side-by-side comparison of developer tools
Highly-scalable distributed database
NoSQL document database
GitHub Stars
⭐ 10,117
⭐ 28,660
Contributors
👥 696
👥 1,505
Pricing
✓ Free
Enterprise: Contact sales
✓ Free
Enterprise: Contact sales
Languages
Java
C++
Features
  • • Cassandra
  • • Database
  • • Java
  • • C Plus Plus
  • • Database
  • • Mongodb
  • • Nosql
Integrations
  • • prometheus
  • • mongodb
Momentum Score
79/100 (slowing)
71/100 (stable)
Community Health
56/100 (moderate)
81/100 (good)
Maturity Index
49/100 (emerging)
70/100 (established)
Innovation Score
24/100 (traditional)
58/100 (progressive)
Risk Score (higher is safer)
52/100 (low)
75/100 (minimal)
Developer Experience
22/100 (poor)
54/100 (needs-improvement)
Links
🌐 Visit Website View on GitHub
🌐 Visit Website View on GitHub

Cassandra Strengths

MongoDB Strengths

  • ✓ More popular (28,660 stars)
  • ✓ Larger community (1,505 contributors)
  • ✓ More features (4 listed)

When to Use Cassandra vs MongoDB

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

Related comparisons

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

More Comparisons

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Data source: GitHub API

Last updated: 10/25/2026