MariaDB and MySQL are two of the most popular open source relational databases, and they share a common ancestor. MariaDB was started in 2009 by the original creators of MySQL after Oracle acquired MySQL, with the goal of keeping a fully community driven, open source alternative available.
For years MariaDB was marketed as a drop in replacement for MySQL, and for many basic workloads that still holds. Over time, though, each project has added its own features and their internals have diverged, so full compatibility can no longer be assumed. This comparison breaks down governance, compatibility, features and where each one fits best.
Side by side
| Aspect | MariaDB | MySQL |
|---|---|---|
| Origin | Community fork of MySQL, started 2009 | Original product, now owned by Oracle |
| Governance | MariaDB Foundation, open development | Oracle led, open source plus commercial editions |
| License | Fully open source (GPL) | Open source Community edition plus paid Enterprise |
| Compatibility | Started as a drop in replacement, has since diverged | The original reference; not 100 percent MariaDB compatible now |
| Default storage engine | InnoDB, plus Aria, ColumnStore and others | InnoDB, with MySQL specific engines |
| JSON support | JSON functions over a text based type | Native JSON data type with rich functions |
| Distro adoption | Default in many Linux distributions | Widely available, common in managed cloud services |
| Best known for | Open governance and extra storage engines | Ubiquity, tooling and broad ecosystem support |
Where each one leads
MariaDB strengths
- Fully open source with an independent, community driven foundation
- Extra storage engines such as Aria, ColumnStore and MyRocks
- Default database in many popular Linux distributions
- Often quick to add new features and syntax improvements
MySQL strengths
- The original and most widely deployed of the two
- Backed by Oracle with commercial support and Enterprise features
- Native JSON data type and a huge ecosystem of tools and drivers
- First class support across nearly every hosting and cloud provider
When to choose each
Choose MariaDB if
- You want a fully open source engine with community governance
- You need one of its extra storage engines like ColumnStore
- Your Linux distribution ships MariaDB as the default
- You want to avoid dependence on a single commercial vendor
Choose MySQL if
- You want the most widely supported, best documented option
- You rely on a managed MySQL service or MySQL specific tooling
- You need the native JSON type or Oracle Enterprise features
- Your team and existing apps are already standardized on MySQL
Verdict
There is no clear winner here, only a fit. Choose MariaDB if open governance, extra storage engines, or a distribution default matter to you. Choose MySQL if you want the most ubiquitous option, the native JSON type, or the backing of a commercial vendor. Because the two diverged from a shared base, test your specific queries and features rather than assuming they behave identically.
Frequently asked questions
Is MariaDB a drop in replacement for MySQL?
It began as one, and for simple workloads switching is often smooth. However, the two projects have diverged, so newer features, some functions and certain data types differ. Test your application rather than assuming full compatibility.
Why was MariaDB created?
The original MySQL developers started MariaDB in 2009 after Oracle acquired MySQL, to guarantee a fully open source, community governed version would always be available. It is named after Monty Widenius daughter Maria.
Which one should I learn first?
Either is a fine starting point because their core SQL is nearly the same. MySQL has slightly more learning material and tooling, while MariaDB skills transfer easily. See the MySQL vs PostgreSQL comparison for another common choice.