Spinnaker is an open source tool for deploying software releases to multiple cloud providers. Winnaker is a tool built by Target that helps automate common tasks when using Spinnaker like starting pipelines, getting stage details, integrating with chat tools, and troubleshooting errors. It removes company-specific code so others can contribute. Winnaker is distributed as a Docker container and makes it easy to pressure test Spinnaker and cloud environments by running multiple pipelines.