Outline VPN is a free and open-source tool that deploys Shadowsocks servers on multiple cloud service providers. The software suite also includes client software for multiple platforms. Outline was developed by Jigsaw, a technology incubator created by Google.[3] The Outline Server supports self-hosting, as well as cloud service providers including DigitalOcean, Rackspace, Google Cloud Platform, and Amazon EC2. Installation involves running a command on its command-line interface, or in the case of installing on DigitalOcean or Google Cloud, its graphical user interface.