PostgreSQL vs Cassandra
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 PostgreSQL if you need ACID Compliance and prefer a free starting option. Choose Cassandra if you prioritize Linear Scalability and want a free tier to start. PostgreSQL has a higher user rating (4.8 vs 4.4).
PostgreSQL vs Cassandra: At a Glance
| Criteria | PostgreSQL | Cassandra |
|---|---|---|
| User Rating | 4.8 | 4.4 |
| 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 | 1996 | 1999 |
Feature Comparison: PostgreSQL vs Cassandra
| Feature | PostgreSQL | Cassandra |
|---|---|---|
| ACID Compliance | ||
| JSON/JSONB Support | ||
| Full-text Search | ||
| Extensibility | ||
| Advanced Indexing | ||
| Partitioning | ||
| Replication | ||
| pgAdmin | ||
| DBeaver | ||
| Prisma | ||
| Sequelize | ||
| TypeORM | ||
| Linux support | ||
| Windows support | ||
| Mac support | ||
| 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 |
PostgreSQL vs Cassandra: Pricing Breakdown
PostgreSQL Pricing
Model: open-source
- Full database functionality
- Community support
- Regular updates
- Enterprise-ready features
Cassandra Pricing
Model: open-source
- Linear scalability
- Fault tolerance
- Multi-datacenter replication
- CQL query language
Pros and Cons
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
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
Who Should Use PostgreSQL vs Cassandra?
Choose PostgreSQL if you:
- Need ACID Compliance
- Want to start for free
- Work primarily on Linux and Windows
- Value JSON/JSONB Support
Choose Cassandra if you:
- Need Linear Scalability
- Want to start for free
- Work primarily on Linux and Windows
- Value Fault Tolerance
Frequently Asked Questions: PostgreSQL vs Cassandra
Is PostgreSQL better than Cassandra?
It depends on your needs. PostgreSQL has a 4.8/5 user rating while Cassandra has 4.4/5. PostgreSQL excels in ACID Compliance and JSON/JSONB Support, while Cassandra stands out with Linear Scalability and Fault Tolerance. Consider your budget (Free vs Free), platform needs, and specific feature requirements.
Which is cheaper, PostgreSQL or Cassandra?
PostgreSQL offers a free plan and starts at Free. Cassandra 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 PostgreSQL and Cassandra 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 PostgreSQL and Cassandra?
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. PostgreSQL emphasizes ACID Compliance, JSON/JSONB Support, Full-text Search while Cassandra focuses on Linear Scalability, Fault Tolerance, Multi-datacenter Replication. User ratings differ slightly: 4.8 vs 4.4 out of 5.
Ready to choose?
Explore detailed reviews, user ratings, and pricing for both PostgreSQL and Cassandra.