Kirby vs Piranha CMS
A side-by-side comparison of two self-hosted content management systems options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Kirby | Piranha CMS |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 84 · Excellent | 84 · Excellent |
| Category | Content Management Systems | Content Management Systems |
| License | Proprietary | MIT |
| Language | PHP | C# |
| Setup difficulty | Medium | Medium |
| Min. RAM | 256 MB | 512 MB |
| Deployment | docker, bare-metal, source | docker, bare-metal, source |
| GitHub stars | ★ 1,531 | ★ 2,196 |
| First released | 2012 | 2011 |
| Replaces | WordPress, Squarespace | WordPress, Umbraco |
What are Kirby and Piranha CMS?
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
Piranha CMS
Piranha CMS is a lightweight, cross-platform content management system built for ASP.NET Core. It is designed to be embeddable in existing applications or run as a standalone CMS.
- Cross-platform on .NET Core
- Block-based content
- Embeddable in apps
- Lightweight design
Kirby vs Piranha CMS: key differences
Kirby is written in PHP, while Piranha CMS is built with C#. Licensing differs — Proprietary for Kirby versus MIT for Piranha CMS. Kirby is the lighter option, starting around 256 MB of RAM against 512 MB for Piranha CMS.
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 Piranha CMS if…
- Easy to embed in projects
- Modern and lightweight
Watch out for
- Smaller feature set
- Limited theme ecosystem
Frequently asked questions
Is Kirby or Piranha CMS better?
Neither is universally better. Piranha CMS has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are Kirby and Piranha CMS free and open-source?
Yes. Kirby is licensed under Proprietary and Piranha CMS under MIT. Both can be self-hosted at no software cost.
Can I run Kirby and Piranha CMS with Docker?
Kirby: yes. Piranha CMS: yes.
Which is lighter on resources, Kirby or Piranha CMS?
Kirby has the smaller minimum footprint at 256 MB of RAM, compared to about 512 MB for Piranha CMS. Real-world usage depends on library size, user count, and enabled features.