Concourse

What Concourse is

Concourse is a free, open-source continuous automation system designed for CI/CD. Its pipelines model dependency flows, using resources to represent external state and jobs to work with those resources. Teams keep pipeline configuration as code in source control and manage it with the fly CLI. The web interface visualizes pipelines and helps trace a failed job to its cause. Tasks run in containers and specify the container images for their dependencies. The fly execute command can run builds locally with changes or reproduce a failed build using its inputs. Concourse includes a git resource type and supports custom resource types declared in pipeline configuration. Authentication options include local accounts and services such as GitHub, GitLab, Gitea, BitBucket Cloud, LDAP, Microsoft, OIDC, OAuth, and SAML. Documented credential manager integrations include AWS Secrets Manager, AWS Systems Manager, Conjur, CredHub, Kubernetes, and Vault. Deployments use web, worker, and PostgreSQL nodes, with Docker Compose and an official Helm chart documented. Concourse is self-hosted; there is no hosted option listed. Its documentation cautions that teams provide trusted multi-tenancy only and describes an initially steeper learning curve.