MySQL vs PostgreSQL: Which Should You Choose? (2026)

MySQL vs PostgreSQL comes down to this: MySQL is the simpler, faster-to-start choice for straightforward web apps, while PostgreSQL is the more powerful, standards-compliant choice for complex data and heavy analytical work. Both are free, open-source, and battle-tested — so the “right” one depends on your project, not on which is objectively better. Here’s how to decide.

What are MySQL and PostgreSQL?

MySQL and PostgreSQL are the two most popular open-source relational databases in the world.

Both store data in tables of rows and columns, both use SQL to query that data, and both are free to run. That shared foundation is why they’re so often compared head-to-head.

The difference is philosophy: MySQL optimized for speed and simplicity; PostgreSQL for correctness, features and extensibility.

The IBM Technology video below gives a clear side-by-side overview before we dig into the details.

MySQL vs PostgreSQL at a glance

Here’s the quick comparison before we break each point down.

What is MySQL?

MySQL is a fast, reliable, open-source relational database first released in 1995 and now owned by Oracle.

It powers a huge share of the web, including the default database behind WordPress. If you’ve used shared hosting, you’ve used MySQL (or its drop-in fork, MariaDB).

Its reputation is built on being easy to set up, well-documented, and quick for the read-heavy workloads typical of websites.

What is PostgreSQL?

PostgreSQL (often “Postgres”) is an advanced, open-source relational database with a 30-plus-year track record and a reputation for correctness.

It’s an “object-relational” database, meaning it supports rich data types, custom functions and extensions far beyond basic tables.

Developers reach for Postgres when data integrity, complex queries or analytical workloads matter. Our PostgreSQL overview goes deeper on its strengths.

Performance: which is faster?

There’s no universal winner — it depends on the workload.

MySQL has traditionally been very fast for simple, read-heavy queries, which is why it suits typical websites.

PostgreSQL shines on complex queries, concurrent writes and large analytical operations, thanks to a sophisticated query planner. For most small sites, both are more than fast enough.

Data types and features

This is where PostgreSQL pulls ahead for advanced use.

Postgres supports a wide range of built-in and custom data types, arrays, ranges, and even geospatial data through the PostGIS extension.

MySQL covers all the common types you need for standard applications, just with fewer exotic options.

SQL standards compliance

PostgreSQL is known for closely following the official SQL standard.

That means more predictable behavior and advanced query features like window functions and common table expressions, which it supported earlier and more completely.

MySQL has closed much of this gap in recent versions, but Postgres is still the stricter, more standards-driven engine.

JSON and NoSQL-style features

Both databases can store JSON, which blurs the line with NoSQL.

PostgreSQL’s JSONB type stores JSON in an efficient binary form you can index and query powerfully — a genuine strength.

MySQL supports JSON too, and it’s perfectly usable, but Postgres is generally considered more capable here. If you need a pure document store, see managed NoSQL platforms.

Replication and scaling

Both scale to serious workloads, with different traditional strengths.

MySQL has long had simple, mature replication that’s easy to set up for read scaling.

PostgreSQL offers robust replication and strong support for complex, write-heavy and analytical scaling. At cloud scale, managed services handle much of this for you — see Aurora vs MySQL for hosting.

Full-text search

Both include built-in full-text search, so you don’t always need a separate search engine.

PostgreSQL’s full-text search is more powerful and flexible out of the box.

MySQL’s is capable for simpler needs. For large-scale search either way, teams often add a dedicated tool like Elasticsearch.

Security

Both are secure when configured properly.

They support SSL connections, role-based access control and strong authentication. PostgreSQL offers particularly granular, row-level security controls.

As always, most database breaches come from weak configuration and credentials, not the engine itself.

Community, ecosystem and tooling

Both have massive, active communities and excellent documentation.

MySQL’s ubiquity means near-universal support in hosting panels, CMS platforms and tutorials.

PostgreSQL’s community is famously enthusiastic, and its extension ecosystem (like PostGIS) is a major draw for specialized work.

Licensing: does it matter?

For most users, no — both are free to use.

PostgreSQL uses a very permissive license with no commercial owner. MySQL is dual-licensed under the GPL and a commercial license from Oracle.

Teams wary of Oracle’s stewardship sometimes prefer Postgres or the community MySQL fork, MariaDB, for peace of mind.

Which is easier for beginners?

MySQL generally has the gentler on-ramp.

It’s the default in most hosting control panels, it’s what WordPress uses, and there are countless beginner tutorials.

PostgreSQL isn’t hard, but its extra power comes with a slightly steeper initial learning curve.

When should you choose MySQL?

Pick MySQL when simplicity and compatibility matter most.

• You’re running WordPress or another CMS that expects it.
• Your app is a standard, read-heavy website.
• You want the widest hosting support and the easiest setup.
• Your team already knows it.

When should you choose PostgreSQL?

Pick PostgreSQL when your data or queries are complex.

• You need advanced queries, strict data integrity or transactions.
• You work with JSON heavily, or geospatial data.
• You’re building analytics or a data-heavy application.
• You want the most standards-compliant, extensible engine.

Can you switch from one to the other later?

Yes, but plan for effort.

Both speak SQL, so basic schemas transfer, but data types, functions and quirks differ enough that migration takes testing.

That’s why it pays to choose sensibly now — our complete guide to databases helps you map your needs first.

What hosting do you need for MySQL or PostgreSQL?

Almost any host supports MySQL; PostgreSQL is widely available but check first.

Shared hosting typically includes MySQL. For PostgreSQL, heavier apps, or full control, a VPS, cloud server or managed database is the better fit.

See our roundup of cloud hosting providers to match the database to the right platform.

Launch a Database-Ready Server →

Common mistakes when choosing a database

• Chasing benchmarks instead of matching the engine to your actual workload.
• Ignoring your stack — if your CMS expects MySQL, fighting it rarely pays off.
• Over-engineering — picking Postgres “for scale” you’ll never reach adds complexity.
• Neglecting backups regardless of engine.
• Forgetting managed options, which remove most of the maintenance burden.

A quick history of MySQL and PostgreSQL

Both databases have deep roots, which explains their personalities.

MySQL launched in 1995 with a focus on speed and ease of use, and it rode the growth of the web to huge popularity. Oracle now stewards it.

PostgreSQL grew out of academic research at Berkeley and has always prioritized correctness, standards and advanced features. That heritage shows in how capable it is today.

MariaDB: the MySQL fork you should know about

When Oracle acquired MySQL, some of its original creators forked the project into MariaDB.

MariaDB is designed as a drop-in replacement for MySQL, so most tools and apps work with either. Many hosts now offer MariaDB by default in its place.

For most users the two are interchangeable; MariaDB simply offers a community-driven alternative with no single commercial owner.

How indexes affect database performance

Whichever engine you choose, indexes matter more than the brand for real-world speed.

An index is like a book’s index — it lets the database find rows without scanning the whole table. Good indexing turns a slow query into an instant one.

Both MySQL and PostgreSQL support powerful indexing; learning to use it well pays off far more than agonizing over which database is “faster.”

Backups and disaster recovery

No database choice matters if you lose your data.

Both engines have mature backup tools, and both support replication so a standby copy is ready if the primary fails.

Whatever you pick, automate your backups, store them off-site, and test that you can actually restore them — the step most people skip.

Managed databases vs self-hosting

You don’t have to run the database server yourself.

A managed database service handles setup, updates, backups, scaling and security for a monthly fee. Self-hosting on a VPS gives you full control and lower cost, but more responsibility.

Beginners and busy teams usually benefit from managed options — see our managed database roundup for how these look in practice.

Who uses MySQL and PostgreSQL in the real world?

Both power some of the largest sites on earth, which should reassure you either way.

MySQL and its fork MariaDB underpin countless WordPress sites and major web platforms. PostgreSQL is a favorite for fintech, analytics and data-heavy applications where integrity is paramount.

The lesson: both are proven at scale. Pick the one that fits your project today, knowing it can grow with you.

Which database is better for WordPress and typical CMSs?

For WordPress, the answer is clear: MySQL (or MariaDB).

WordPress and most popular content-management systems are built and tested against MySQL, so it’s the smoothest, best-supported choice.

PostgreSQL is fantastic elsewhere, but running a MySQL-first CMS on it means fighting the platform — not worth it for most site owners.

Do you need to know SQL to use either?

Not to get started, no.

If you use WordPress or a similar platform, it talks to the database for you — you may never write a query by hand.

SQL becomes useful when you build custom applications or run reports, and the basics transfer neatly between MySQL and PostgreSQL.

Cost: is one cheaper to run?

The software is free for both, so cost comes down to hosting.

MySQL’s ubiquity means it’s included on virtually all shared hosting at no extra charge. PostgreSQL may need a VPS, cloud server or a managed service, which can cost a little more.

For a small site the difference is negligible; at scale, managed database pricing matters more than the engine itself.

Can you use MySQL and PostgreSQL together?

Yes — larger applications sometimes use both.

You might run MySQL for a content-heavy front end and PostgreSQL for analytics or complex reporting, each doing what it does best.

For a single small site, though, one database is simpler; reach for two only when a real need appears.

Frequently Asked Questions

Is PostgreSQL better than MySQL?

Neither is universally better. PostgreSQL is more powerful and standards-compliant, making it ideal for complex queries, analytics and strict data integrity. MySQL is simpler and fast for typical read-heavy websites. The best choice depends on your workload, stack and team’s experience.

Which is faster, MySQL or PostgreSQL?

MySQL is traditionally very fast for simple, read-heavy queries, while PostgreSQL excels at complex queries and concurrent, write-heavy or analytical workloads thanks to its advanced query planner. For most small websites, both are more than fast enough.

Does WordPress use MySQL or PostgreSQL?

WordPress uses MySQL (or its compatible fork MariaDB) by default. That’s a big reason MySQL is so widely supported on shared hosting. Running WordPress on PostgreSQL is not officially supported and isn’t recommended for most users.

Are MySQL and PostgreSQL free?

Yes, both are free and open-source. PostgreSQL uses a permissive license with no commercial owner. MySQL is dual-licensed under the GPL and a commercial license from Oracle; the community edition remains free to use.

Can PostgreSQL replace a NoSQL database?

Often, yes. PostgreSQL’s JSONB type lets it store and query JSON documents efficiently, covering many use cases people once needed a NoSQL database for. For pure, massive-scale document or key-value workloads, a dedicated NoSQL platform may still fit better.

Is it hard to migrate from MySQL to PostgreSQL?

It’s doable but takes planning. Both use SQL, so schemas largely transfer, but differences in data types, functions and syntax mean you should test thoroughly and use migration tools. Choosing the right database up front avoids the effort entirely.

Which database should a beginner start with?

Beginners usually find MySQL easier to start with, since it’s the default in hosting panels and behind WordPress, with abundant tutorials. PostgreSQL is a great second step (or a fine first one) when you need its advanced features and stricter standards compliance.

The bottom line

MySQL and PostgreSQL are both excellent, free databases — the winner is simply the one that fits your project.

Reach for MySQL for straightforward, compatible, read-heavy web apps; reach for PostgreSQL when complexity, integrity or analytics take center stage.

Whichever you choose, match it to the right platform — start with our complete guide to databases and cloud hosting options.