Prompt
What should I use for a new application database, PostgreSQL or MySQL?
Latest observation
Oct 7, 2026
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If you’re starting a new application database and both are acceptable, PostgreSQL is usually the better default choice.
Why PostgreSQL is often preferred
- Stronger SQL compliance and richer features: great support for complex queries, CTEs, window functions, JSON, indexes, constraints, and advanced transactions.
- Better data integrity tools: stricter behavior helps catch issues earlier.
- Excellent for growing apps: performs well for both simple CRUD and more complex workloads.
- Extensibility: lots of built-in and extension support.
When MySQL might be a better fit
- Your team already knows MySQL well
- You’re working with an existing MySQL ecosystem
- Your workload is very simple and CRUD-heavy
- Your hosting/deployment stack is already optimized for MySQL
Practical recommendation
- Choose PostgreSQL if you want the safest long-term default for a new project.
- Choose MySQL if compatibility, existing expertise, or infrastructure makes it the easier operational choice.
Quick rule of thumb
- New app, no strong constraints: PostgreSQL
- Legacy compatibility or ops simplicity with existing MySQL setup: MySQL
If you want, I can also give you a decision matrix based on your app type (SaaS, e-commerce, analytics, mobile backend, etc.).
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