Amazon DynamoDB vs PostgreSQL
Side-by-side comparison of Amazon DynamoDB and PostgreSQL. Data-driven analysis for CTOs and engineering leaders.
Technical Profile
Amazon DynamoDB
PostgreSQL
When to Use
Amazon DynamoDB
- +Serverless architectures
- +Unpredictable workloads
- +Need auto-scaling
- +AWS-native stack
Avoid Amazon DynamoDB when
- -Complex queries required
- -Multi-cloud strategy
- -Strong consistency critical across regions
PostgreSQL
- +Need ACID guarantees
- +Complex queries and joins
- +Data integrity is critical
- +Flexible schema evolution
- +Multi-model data (relational + JSON)
Avoid PostgreSQL when
- -Simple key-value storage only
- -Need massive horizontal scale out of box
- -Team only knows NoSQL
Compliance & Security
Amazon DynamoDB
Security Features
PostgreSQL
Security Features
Operations
Amazon DynamoDB
PostgreSQL
Frequently Asked Questions
How does scalability compare between Amazon DynamoDB and PostgreSQL?
Amazon DynamoDB offers very-high scalability, while PostgreSQL offers high scalability. Consider your expected traffic and data volume when choosing.
Which has the easier learning curve: Amazon DynamoDB or PostgreSQL?
Amazon DynamoDB has a moderate learning curve, while PostgreSQL has a moderate learning curve. Factor in your team's existing skills and onboarding timeline.
What are the pricing differences between Amazon DynamoDB and PostgreSQL?
Amazon DynamoDB uses a usage-based pricing model starting at Pay per request, free tier 25GB with a free tier. PostgreSQL uses a free pricing model with a free tier. Evaluate total cost of ownership including operational overhead.
Which option is better for compliance: Amazon DynamoDB or PostgreSQL?
Amazon DynamoDB supports SOC 2, GDPR, HIPAA, PCI-DSS. PostgreSQL supports SOC 2, GDPR, HIPAA, PCI-DSS. Always verify current certifications directly with the vendor.
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