Enjoy your personal cloud

Cozy is the assistant that simplifies your life. You can trust it to keep your privacy safe and to serve you. Here are its main features:

9000 apps are downloaded each month!

Create apps for your Cozy server and share them with other users

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Fast application development.
Cozy speeds up your web app development. It provides you with ready to-go templates, a simple web framework, an ODM and many more helpers. No specific IDE is required, you keep your favorite editor!

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JavaScript based.
You can build your web app with a single language for client and server: JavaScript. Soon, we will support applications composed only of HTML5 and Javascript, no server will be required.

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App sharing made easy.
You will distribute your app easily to the entire community by sharing the Git URL of your repository. No need to worry about deployment anymore!

We're not trying to lock you in

What is annoying nowadays with online services is that they lock you in. This is not what we intend to do with Cozy. That's why you have the capability to delete your data and leave the platform anytime you want.
See for yourself by clicking the button below:

Cozy is architectured like a PaaS


The proxy handles all user requests. It manages the authentication and routes requests to the right application.

home / controller

The home app is an UI for the controller. It allows to install or remove applications and to set user parameters.

app 1

This is an application provided by Cozy Cloud or the community. It is spawned by the home that finds the sources on a github repo.

app 2

Your choice: notes, mails, budget, sport coach…

your app

This is an application you developed. You can spawn it like any other applications.

data system

The data system is a layer between apps and data. It manages application permissions and provides a unified API to access to all kind of data: files, documents or indexes. It publishes changes, so that applications can share data with each other.


This NoSQL storage stores documents as JSON objects.

file system

Files are stored directly in the database as attachments of documents. A fuse implementation is on the roadmap to make things smoother.


A dedicated module handles content indexation through a REST API. It's your personal search engine.

Join our community

We need your help to make sure we can build the best Personal Server around. Connect with us to get tech support, to share your thoughts, integrate your contributions or show off your brand new app.

Get in touch

Please keep me informed about what's going on at Cozy (very low volume newsletter, no spam, we promise!):

I want to contribute to the Cozy project as an app developer, beta tester and/or localizer and enjoy one of these free fancy Cozy instances with 1GB of RAM and 10GB of disk space (available in limited numbers, hosted in France).

Need to contact the team for other reasons ? Just use this trusty and decentralized tool called email by sending a message to contact@cozycloud.cc.


Cozy is proudly hand-crafted in France by the Cozy Cloud team, a young open-source startup.

Cozy Cloud's team goal is to build an open-source, decentralized, trusted personal cloud that can help all of us take back control of our personal data while benefiting of cutting-edge cloud services.

Photo Credits: Cozy Cloud, TechGenStaffer (Flickr), license Creative Commons
Icons: iconmonstr, KNACSS & Icomoon

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