Kirby vs WordPress
A side-by-side comparison of two self-hosted content management systems options — licensing, setup difficulty, resource needs, and what each one replaces.
WordPress
The most popular content management system in the world
| Feature | Kirby | WordPress |
|---|---|---|
| Deploy effort | Under-an-hour setup | ≈5-minute setup |
| Health score | 84 · Excellent | 95 · Excellent |
| Category | Content Management Systems | Content Management Systems |
| License | Proprietary | GPL-2.0 |
| Language | PHP | PHP |
| Setup difficulty | Medium | Easy |
| Min. RAM | 256 MB | 512 MB |
| Deployment | docker, bare-metal, source | docker, bare-metal, one-click |
| GitHub stars | ★ 1,531 | ★ 21,434 |
| First released | 2012 | 2003 |
| Replaces | WordPress, Squarespace | Wix, Squarespace, WordPress.com |
What are Kirby and WordPress?
Kirby
Kirby is a flexible file-based content management system that stores content in plain text files and gives developers full control over markup. It is popular for portfolios and custom-designed websites.
- File-based content storage
- Flexible panel for editors
- No database required
- Developer-friendly templating
WordPress
WordPress is the world's most widely used open-source CMS, powering a large share of all websites. It offers a vast ecosystem of themes and plugins for building blogs, business sites, and complex web applications.
- Huge theme and plugin ecosystem
- Block-based Gutenberg editor
- Massive community support
- REST API for headless use
Kirby vs WordPress: key differences
Both projects are written in PHP. Licensing differs — Proprietary for Kirby versus GPL-2.0 for WordPress. Kirby is the lighter option, starting around 256 MB of RAM against 512 MB for WordPress. WordPress is the more established project (first released 2003), while Kirby arrived in 2012. WordPress has the considerably larger community, at 21,434 GitHub stars versus 1,531.
Why pick each one
Choose Kirby if…
- Easy backups and version control
- Highly customizable
Watch out for
- Commercial license required for production
- Free only for personal use
Choose WordPress if…
- Unmatched ecosystem and documentation
- Easy for non-technical users
Watch out for
- Frequent target for attacks
- Plugin bloat can slow sites
Frequently asked questions
Is Kirby or WordPress better?
WordPress is the stronger all-round pick: it has both the larger community and the simpler easy setup. Consider Kirby if its specific feature set fits your needs better.
Are Kirby and WordPress free and open-source?
Yes. Kirby is licensed under Proprietary and WordPress under GPL-2.0. Both can be self-hosted at no software cost.
Can I run Kirby and WordPress with Docker?
Kirby: yes. WordPress: yes.
Which is lighter on resources, Kirby or WordPress?
Kirby has the smaller minimum footprint at 256 MB of RAM, compared to about 512 MB for WordPress. Real-world usage depends on library size, user count, and enabled features.