Functionality
Features
Plug and play
Simply drop in Klay.php, include it, put in a few lines of config and you're good to go, whether you're developing a new site or fitting it into an existing. It's that easy.
PHP based
Will run on anything from DigitalOcean droplets to FortRabbit apps or the most basic shared webhotel.
Snappy database
Fast and scalable SQLite database. File-based and portable with no need for separate database server. Built-in query engine.
Flexible
Total freedom over everything from item types to fields and blocks. Build whatever you want. Use Klay to render your site with routing, controllers, views and asset render functions, or use Klay as your selfhosted headless API CMS for an app or website.
Super fast
Edit content faster than ever. Lightning fast admin panel with keyboard shortcuts and keyboard search and command system.
Tiny footprint
Entire CMS lives in a single ~380KB PHP file, which is smaller than this this gif. That's 0,04% the size of WordPress. No reason to clutter server ressources with jank.
Featured packed
Live previews, library tags, backup manager, content seeding, webhooks, plugins and more.
Multi-language
Multilingual built into the core. No more 3rd party plugins doing things halfway.
URL routing
Built-in. Make an API? Filter certain HTTP methods? You've got it.
Content seeding
Want to test how fast your site will behave with 10.000 news articles? With the built-in seeder you can quickly generate dummy items.
Safety first
Never lose content again. Create zipped content backups directly from the admin panel.
Optimized assets
Uploaded images are automatically scaled to preferred size versions.
Any questions?
FAQ
Here you'll find answers to the most relevant questions.
Got a question not answered here?
Why not just use WordPress?
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Why not just use Craft CMS, for instance?
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Why not a Composer library
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Why the commercial license??
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Testimonials
What people are saying
Headless API was too expensive for us, and Craft was okay, but forced us to do things we didn't want to do. Klay is so small, but packs a powerful punch.
Mikkel Grønvold
Backend developer
So easy to use and so fast. For all new campaigns I'm requiring we use Klay. I cannot go back to WordPress.
Sandra Fredriksson
Marketing lead
Once I saw this and tried it out I was hooked. No more WordPress. Klay can even quickly be retrofitted onto existing sites with no CMS.
Laurits Faber
Frontend developer
Klay is so much faster than other CMS systems. Both in development time and in the admin panel. It's got every functionality needed and is a joy to work with. Give it a chance!
Alexander Schwartzlose
Web developer
Having used Contentful, we switched to Klay, since the system is faster and more flexible to our needs. Plus, the commercial license only cost us one-time what we used to pay each month. Total no-brainer.
Laura Müller
Content specialist
In the field
Made with Klay
Legal stuff
License
Personal use license
Building something for yourself or a friend?
Klay is FREE to use for personal projects and single-person commercial projects.
Commercial license
Building for a client or your employer?
$299 per project, which includes one year of updates, $99/year for additional updates.
Full license text as well as licensing FAQ and purchase link here.
Hi, I'm William. I built Klay out of frustration with existing alternatives.
I'm a full-stack developer based in Copenhagen, where I run a web agency called Milk Studio, working for clients small and large.