owncloud/ocis

What is it?

Key features

• 01Single binary or container that scales from small devices to Kubernetes clusters.
• 02Sync and share via WebDAV and CS3 APIs, with web, Android, iOS and desktop clients.
• 03OpenID Connect authentication with external IdPs like Keycloak or the embedded LibreGraph Connect.
• 04Web office integration with Collabora Online, OnlyOffice and Microsoft Office Online through WOPI.
• 05Multiservice architecture that lets operators run only the services they need.

Use cases

• Running a private file sync and share service on a home server or small VM.
• Deploying a team file platform on Kubernetes with an existing Keycloak instance.
• Adding collaborative document editing to self-hosted file storage.

Quick start

1. 1

   Pull the oCIS Docker image

   docker pull owncloud/ocis
2. 2

   Initialize the configuration

   docker run --rm -it --mount type=bind,source=$HOME/ocis/ocis-config,target=/etc/ocis --mount type=bind,source=$HOME/ocis/ocis-data,target=/var/lib/ocis owncloud/ocis init --insecure yes
3. 3

   Start the server, then open localhost:9200 and log in with the printed user and password

   docker run --name ocis_runtime --rm -it -p 9200:9200 --mount type=bind,source=$HOME/ocis/ocis-config,target=/etc/ocis --mount type=bind,source=$HOME/ocis/ocis-data,target=/var/lib/ocis -e OCIS_INSECURE=true -e PROXY_HTTP_ADDR=0.0.0.0:9200 -e OCIS_URL=https://localhost:9200 owncloud/ocis

Things to know

• !Building from source requires Go 1.25.10 or newer and a C compiler, and the source build is recommended only for development.
• !Some stable builds provided by ownCloud GmbH are subject to an End User License Agreement.

In collections

Topics

FAQ

What is ocis?

Self-hosted file sync and share platform from ownCloud, built as a single Go binary with WebDAV and CS3 APIs. ownCloud Infinite Scale (oCIS) is a self-hosted file sync and share platform. It ships as a single binary or container and can scale from a Raspberry Pi to a Kubernetes cluster by changing configuration and starting services as needed. Its multiservice architecture lets operators choose which functions to run and reuse existing services such as Keycloak.

Is ocis free to use? What license does it have?

ocis is open source under the Apache-2.0 license. Check the license terms before using it in commercial products.

Is ocis still maintained?

Actively maintained. The last commit to ocis was on Oct 24, 2026.

What can I use ocis for?

Running a private file sync and share service on a home server or small VM. Deploying a team file platform on Kubernetes with an existing Keycloak instance. Adding collaborative document editing to self-hosted file storage.

How do I install ocis?

Pull the oCIS Docker image: docker pull owncloud/ocis Initialize the configuration: docker run --rm -it --mount type=bind,source=$HOME/ocis/ocis-config,target=/etc/ocis --mount type=bind,source=$HOME/ocis/ocis-data,target=/var/lib/ocis owncloud/ocis init --insecure yes Start the server, then open localhost:9200 and log in with the printed user and password: docker run --name ocis_runtime --rm -it -p 9200:9200 --mount type=bind,source=$HOME/ocis/ocis-config,target=/etc/ocis --mount type=bind,source=$HOME/ocis/ocis-data,target=/var/lib/ocis -e OCIS_INSECURE=true -e PROXY_HTTP_ADDR=0.0.0.0:9200 -e OCIS_URL=https://localhost:9200 owncloud/ocis

Where can I get ocis?

The source code and installation instructions are on GitHub: https://github.com/owncloud/ocis