PostgreSQL vs MySQL

Side-by-side — pricing, strengths, tradeoffs, and fit.

PostgreSQL

The world’s most advanced open-source relational database.

MySQL

A popular relational database management system.

At a glance

Open SourceFree Tier
● Established·From $0
Open SourceFree Tier
◌ Declining·From $0

Overview

One-liner

The world’s most advanced open-source relational database.

One-liner

A popular relational database management system.

Maturity

Established

Maturity

Declining

Open source

✓ Yes

Open source

✓ Yes

Pricing

Free tier

✓ Available

Free and open source

Free tier

✓ Available

Open source — free to use

Starts at

$0

Starts at

$0

Model

Flat rate

Model

Flat rate

Enterprise

✕ None

Enterprise

✕ None

Best for

✓ Best for

Most application databasesReliable, flexible relational store with JSON support
RAG/AI apps via pgvectorVector search alongside relational data

✓ Best for

Developers building scalable web applications that require robust data management
Teams needing a reliable relational database solution for enterprise systems
Projects requiring high performance and scalability in data storage

Not ideal for

✕ Not for

—

✕ Not for

Real-time data processing where low latency is critical
Use cases requiring non-relational or NoSQL databases

Strengths

↑ Strengths

Extremely capable and extensible
Rock-solid reliability
Ubiquitous managed options

↑ Strengths

Relational database management system
Supports SQL queries and transactions
High performance and scalability
Open-source with a large community

Weaknesses

↓ Weaknesses

Self-managing at scale is non-trivial
Defaults need tuning for big workloads

↓ Weaknesses

Limited support for NoSQL data models
Performance degradation with complex queries
Vendor lock-in for certain features
Setup can be complex for beginners
Full PostgreSQL profile →Full MySQL profile →