MySQL vs PostgreSQL

The two databases everyone learns first. One is simpler, the other is more powerful. Here's which one you should actually pick.

The Real Difference

MySQL was built for speed and simplicity. PostgreSQL was built for correctness and features. In 2005, that tradeoff mattered — MySQL was meaningfully faster for simple queries.

In 2026, PostgreSQL has closed the performance gap while MySQL still hasn't closed the feature gap. PostgreSQL supports JSON operators, CTEs, window functions, full-text search, and geospatial queries out of the box. MySQL has bolted on some of these, but they feel bolted on.

JSON Support Is Not Even Close

If you're storing any JSON (and you probably are), PostgreSQL's jsonb type is leagues ahead. You can index individual JSON fields, query nested objects with operators like -> and ->>, and use JSON path expressions.

MySQL added JSON support in 5.7, but it's clunky. No partial index support on JSON fields, worse query syntax, and generated columns are the workaround for everything. If your app mixes relational and document data, PostgreSQL handles it natively.

Where MySQL Still Wins

MySQL is simpler to set up, simpler to administer, and simpler to replicate. If you're running a WordPress site or a simple CRUD app and don't need PostgreSQL's advanced features, MySQL works fine.

MySQL's replication story is also more mature in some deployment patterns. Galera Cluster, Group Replication, and the sheer number of MySQL DBAs in the market mean operational expertise is cheaper.

Also: if you're using PlanetScale, you're using MySQL (Vitess). Their serverless branching model is excellent.

The Managed Database Factor

On managed services, PostgreSQL is available everywhere MySQL is: AWS RDS, Google Cloud SQL, Azure, Supabase, Neon, Railway. The operational complexity argument for MySQL has largely evaporated.

Supabase built their entire platform on PostgreSQL. Neon offers serverless PostgreSQL with branching. These are the platforms developers actually want to use in 2026.

What People Get Wrong

The biggest myth: "MySQL is faster." This hasn't been meaningfully true since PostgreSQL 12. Modern PostgreSQL with proper indexing matches or beats MySQL on most workloads. The benchmarks people cite are usually from 2018.

The second myth: "PostgreSQL is harder." The learning curve is maybe 2 hours longer. You'll make that back in the first week when you need a feature MySQL doesn't have.

Migration Reality

If you're on MySQL and it's working, don't migrate for the sake of it. Migration is painful — data types don't map 1:1, stored procedures need rewriting, and ORM differences will bite you.

But if you're starting fresh? PostgreSQL. Every time.

Quick Comparison

Factor	MySQL	PostgreSQL
JSON Support	Basic	Excellent (jsonb)
Performance	Fast	Fast
Extensions	Limited	Rich ecosystem (PostGIS, pgvector)
Replication	Mature, many options	Logical + streaming
Standards Compliance	Partial	Excellent
Managed Options	RDS, PlanetScale, Cloud SQL	RDS, Supabase, Neon, Cloud SQL
Learning Curve	Easier	Slightly steeper
Full-Text Search	Basic	Built-in, good

The Verdict

Use MySQL if: You're running WordPress, using PlanetScale, or maintaining an existing MySQL codebase that works fine.

Use PostgreSQL if: You're starting a new project. Any new project. Especially if you need JSON, geospatial, full-text search, or vector similarity.

Consider: If you're using Supabase or Neon, you're already on PostgreSQL. Good choice.

The Bottom Line

PostgreSQL wins

PostgreSQL wins for almost every new project in 2026. Better JSON support, better extensibility, better standards compliance, and the performance gap that MySQL once had is gone. MySQL is fine if you already have it, but there's no reason to choose it for something new.

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