Scalable Content Platform API-first CMS for building content-powered apps in any programming language.

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Developers at successful companies choose Cosmic JS

For Developers


Cosmic JS offers an intuitive API that can deliver content to any website or application. This gives you the freedom to build your application using any programming language and allows for easier scaling within your development team.

Developer tools and features are offered as valuable time-savers during the development process. It's easier than ever to manage your project from the first line of code, to content population, to launch day.

For Content Editors


Cosmic JS offers a streamlined editing experiece that gives you everything you need to publish content quickly and easily. Since there is no CMS installation, you can easily build content in any phase of development and avoid unnecessary process bottlenecks.

Add rich text, drag and drop media and upload video. Set roles and permissions for easy content collaboration within your team. Content management is faster, easier and keeps the project on track.

What Can You Create?


This single page website landing page is build using Node.js and a minimal theme from Start Bootstrap.  Install, deploy and edit every part of this landing page website from your Cosmic JS Bucket Dashboard.

Landing Page

A basic example of how you can use the Cosmic JS localization feature.  It uses simple Ajax requests to switch content between four different locales.

Localization Example

This real estate website satisfies some common website requirements including dynamic pages, listing management, blog articles, author management, SEO ability, contact form and website search.

Real Estate

A website for the forward-thinking creative agency.  Built on a modern Node.js / Cosmic JS stack, features include team management, portfolio grid, contact form and more.

Creative Agency

This example app demonstrates how you can use React, MobX and the Cosmic JS API to create and remove posts from your bucket.

MobX Example App

This powerful website gives you both the flexibility to manage content from the Cosmic JS API and the speed of static HTML.  Plus you can use Markdown files and automate the build process using Webhooks.  Check out the accompanying article to see how it's built.

Static Website

Product Tour


People Have Said...

I've looked at six options and I like what you've done at Cosmic JS best!

Content Editor, Cloud Consulting Firm, Washington, DC

After demos of all cloud-based content platforms on pages 1 - 3 of Google, we found Cosmic JS to be the best option for our team.

Agency Principal, Creative and Interactive Agency, Madison, WI

We would have boosted our margin by more than 40% on our last interactive project had we used an API-first CMS like Cosmic JS.

Brand Manager, Interactive Projects, Dallas, TX

Next time I need to build a CMS I'll definitely replace WordPress with Cosmic JS and slap a react front end on it.

Developer, National Magazine, Sydney, AUS

Cosmic JS makes me continuously say, where have you been all my life!

Software Engineer, Interactive Agency, Pennsylvania, USA

Cosmic JS totally rocks!

iOS developer, Interactive Agency, New York, NY