PostgreSQL vs MySQL: which should you choose in 2026?

Both PostgreSQL and MySQL are battle-tested, open-source relational databases that can handle most web workloads. Choosing between them is more about ecosystem fit than raw capability. Here's a pragmatic guide.

MySQL (and MariaDB)

MySQL is the most widely deployed relational database in the world. MariaDB is a MySQL fork with performance improvements and additional storage engines — they're largely interchangeable.

Choose MySQL/MariaDB when:

You're using WordPress, Drupal, or another PHP CMS — they're designed for MySQL
Your team has existing MySQL expertise
You need the largest pool of managed hosting options
You want maximum read performance with simple queries and proper indexing

PostgreSQL

PostgreSQL (Postgres) is known for standards compliance, advanced data types, and correctness. It's the preferred choice in the Python and Ruby ecosystems and among developers who work with complex data.

Choose PostgreSQL when:

You need JSON/JSONB support with indexing and querying capabilities
You're working with geospatial data (PostGIS)
You need advanced features: CTEs, window functions, full-text search, LISTEN/NOTIFY
You're building with Django, Rails, or FastAPI — these communities default to Postgres
You need strict ACID compliance and complex transactions

Performance

For simple read-heavy workloads (typical WordPress or read-heavy APIs), MySQL with proper indexing is often faster out of the box. PostgreSQL's query planner is more sophisticated and tends to win on complex queries with joins and aggregations.

In practice, for most web applications, the database is rarely the bottleneck — query design, indexing, and caching matter more than the engine choice.

Ecosystem in 2026

The JavaScript ecosystem (Prisma, Drizzle, Supabase) has moved heavily toward PostgreSQL. PHP/WordPress remains MySQL territory. Python frameworks are PostgreSQL-first.

The decision you will actually regret

In practice, almost nobody looks back and wishes they had picked the other engine. What people regret is the operational work they did not set up on day one, and that part is identical for both:

Backups that were never restored. A nightly dump you have never tested is a guess. Restore one into a scratch database and confirm the row counts before you need it.
The database exposed to the internet. Neither engine should listen on a public port. Keep it on the private network and tunnel in when you need a client.
No connection pooling. PostgreSQL in particular is sensitive here — every connection is a process, and an app that opens one per request will exhaust the server long before the query load does.
Data on the container's own filesystem. Recreate the container and it is gone. Database files belong on a persistent volume.

On Simplewala

Both are available as one-click installs. Install MySQL for WordPress, install PostgreSQL for everything else. Run both on the same server if your stack needs it — they coexist without conflict.

The four items above are handled by default rather than left to you. Database data is written to persistent block storage, so rebuilding or resizing the container does not touch it. The engine binds to the private network, and remote access is opt-in through a Front Door TCP route rather than an open port. Daily snapshots run automatically with one-click restore. You still get root SSH and a normal client connection string — nothing is hidden — but the defaults are the safe ones. That, rather than the engine choice, is usually what decides whether a database survives its first bad week.

# Check MySQL version
mysql --version

# Check PostgreSQL version
psql --version

Bottom line

WordPress / PHP apps → MySQL or MariaDB
Python, Node.js, Ruby apps → PostgreSQL
Don't know? → PostgreSQL. It handles everything MySQL does, plus more.

Keep reading

Database hosting MySQL, MariaDB, PostgreSQL, Redis, MongoDB, Kafka, and Memcached in one click. Backups you can restore Whichever engine you pick, an untested database backup is not a backup. Docker Compose in production Persistence, volumes, and why containers lose data when you get it wrong. Platform features Persistent block storage, remote access, and monitoring for every engine.