Cassandra vs PostgreSQL
A comprehensive head-to-head comparison of two leading database & data management solutions in 2026. Compare features, pricing, ratings, and more to find the right fit.
Quick Verdict
Choose Cassandra if you need Linear Scalability and prefer a free starting option. Choose PostgreSQL if you prioritize ACID Compliance and want a free tier to start. PostgreSQL has a higher user rating (4.8 vs 4.4).
Cassandra vs PostgreSQL: At a Glance
| Criteria | Cassandra | PostgreSQL |
|---|---|---|
| User Rating | 4.4 | 4.8 |
| Pricing | Free | Free |
| Pricing Model | open-source | open-source |
| Free Plan | ||
| Platforms | Linux, Windows, Mac, Docker | Linux, Windows, Mac, Docker |
| Category | Database & Data Management | Database & Data Management |
| Founded | 1999 | 1996 |
Feature Comparison: Cassandra vs PostgreSQL
| Feature | Cassandra | PostgreSQL |
|---|---|---|
| Linear Scalability | ||
| Fault Tolerance | ||
| Multi-datacenter Replication | ||
| Tunable Consistency | ||
| CQL Query Language | ||
| Distributed Architecture | ||
| No Single Point of Failure | ||
| DataStax | ||
| Apache Spark | ||
| Apache Kafka | ||
| Presto | ||
| cqlsh | ||
| Linux support | ||
| Windows support | ||
| Mac support | ||
| ACID Compliance | ||
| JSON/JSONB Support | ||
| Full-text Search | ||
| Extensibility | ||
| Advanced Indexing | ||
| Partitioning | ||
| Replication | ||
| pgAdmin | ||
| DBeaver | ||
| Prisma | ||
| Sequelize | ||
| TypeORM |
Cassandra vs PostgreSQL: Pricing Breakdown
Cassandra Pricing
Model: open-source
- Linear scalability
- Fault tolerance
- Multi-datacenter replication
- CQL query language
PostgreSQL Pricing
Model: open-source
- Full database functionality
- Community support
- Regular updates
- Enterprise-ready features
Pros and Cons
Cassandra
Pros
- Highly rated by users (4.4/5)
- Free plan available to get started
- Available on 4 platforms (Linux, Windows, Mac, Docker)
- Rich feature set with 15+ capabilities
- Strong Linear Scalability functionality
- Strong Fault Tolerance functionality
Cons
- May require time to learn advanced features
PostgreSQL
Pros
- Highly rated by users (4.8/5)
- Free plan available to get started
- Available on 4 platforms (Linux, Windows, Mac, Docker)
- Rich feature set with 15+ capabilities
- Strong ACID Compliance functionality
- Strong JSON/JSONB Support functionality
Cons
- May require time to learn advanced features
Who Should Use Cassandra vs PostgreSQL?
Choose Cassandra if you:
- Need Linear Scalability
- Want to start for free
- Work primarily on Linux and Windows
- Value Fault Tolerance
Choose PostgreSQL if you:
- Need ACID Compliance
- Want to start for free
- Work primarily on Linux and Windows
- Value JSON/JSONB Support
Frequently Asked Questions: Cassandra vs PostgreSQL
Is Cassandra better than PostgreSQL?
It depends on your needs. Cassandra has a 4.4/5 user rating while PostgreSQL has 4.8/5. Cassandra excels in Linear Scalability and Fault Tolerance, while PostgreSQL stands out with ACID Compliance and JSON/JSONB Support. Consider your budget (Free vs Free), platform needs, and specific feature requirements.
Which is cheaper, Cassandra or PostgreSQL?
Cassandra offers a free plan and starts at Free. PostgreSQL offers a free plan and starts at Free. Compare the specific plan features to determine the best value for your use case.
Can I use Cassandra and PostgreSQL together?
While both are database & data management tools, some teams use complementary software together. Check each product's API and integration capabilities for compatibility. However, most users find that one solution covers their core database & data management needs.
What are the main differences between Cassandra and PostgreSQL?
The key differences include: pricing model (open-source vs open-source), platform support (Linux, Windows, Mac, Docker vs Linux, Windows, Mac, Docker), and feature focus. Cassandra emphasizes Linear Scalability, Fault Tolerance, Multi-datacenter Replication while PostgreSQL focuses on ACID Compliance, JSON/JSONB Support, Full-text Search. User ratings differ slightly: 4.4 vs 4.8 out of 5.
Ready to choose?
Explore detailed reviews, user ratings, and pricing for both Cassandra and PostgreSQL.