What it is

Cozy is a platform that brings web services into one private space. Cozy-Stack is the core server of the Cozy platform, and it runs as a single process. The project is written in Go, is developed by Twake Workplace, and is distributed under the AGPL v3 license. It lives in the self-hosted personal cloud ecosystem, and it targets users who want to install software on their own hardware instead of relying on a third-party profile.

The concrete problem is data fragmentation across web apps and devices. Cozy-Stack serves installed web applications, exposes a REST API for document operations, and lets client applications sync data with the server. This gives a private space where web apps and devices can share data, while the operator keeps control over the hardware and the data.

Key capabilities

• Cozy-Stack serves web applications that users install from the application store.
• The REST API creates, updates, and deletes documents inside the database.
• The server authenticates users and client applications with session tokens and OAuth2.
• The server can send emails and launch jobs for one-time or periodic tasks.
• Connectors can import data from remote websites as jobs executed on the server.
• Jobs that execute third-party code on the server side are sandboxed with nsjail.
• The database replication API syncs documents between the server and local databases, including mobile clients.

Who uses it and how

• Self-hosters install Cozy on their own hardware to keep web services in a private space without profiling.
• Users access installed web applications through the Cozy-Stack server and its application store.
• Client applications use OAuth2 and the REST API to work with documents stored on the Cozy instance.
• Data-import workflows use connectors, which run as server jobs and can be sandboxed when they execute third-party code.
• Mobile clients use the replication API to keep local databases synchronized with the Cozy server.

Getting started

The provided README points to docs/INSTALL.md for installation and docs/config.md for configuration. It does not list Docker image names, package managers, or a hosted option.

When to use it — and when not to

Cozy fits self-hosters who want a private platform for installed web apps, document sync, connectors, and authenticated client applications. The operator must still run and configure the underlying database, email sending, and job execution path, and the provided README gives no Docker or hosted deployment shortcut. The supplied metadata shows a repository age of 0 years, 0 contributors, and 56 open issues, so teams that need clear maintenance history or fast setup may need to review the project carefully.