Argo CD is a CNCF-graduated Kubernetes-native GitOps continuous delivery tool that uses Git repositories as the single source of truth for declarative app deployment, auto-sync, multi-cluster management, and security compliance.
Wercker is a container CI/CD platform founded in 2012 in Amsterdam, Netherlands, and acquired by Oracle in 2015, known for Docker-native builds and declarative YAML pipelines.
Spinnaker is Netflix's open-source multi-cloud continuous delivery platform, supporting advanced deployment strategies and automated release management across AWS, GCP, Azure, and more, ideal for large cloud-native applications.
Screwdriver CD is an open-source continuous delivery platform open-sourced by Yahoo in 2015, offering container-native builds, declarative YAML pipelines, and auto-scaling.
ReleaseHub (now branded Release) is a release orchestration and deployment platform founded in 2014 in the USA, featuring git-push deployments, full-stack ephemeral environments, and deploy-to-your-own-cloud.
GoCD is ThoughtWorks' open-source continuous delivery server, known for visual pipelines, value stream mapping, and complex deployment strategy support, focused on pipeline dependency management and deployment orchestration.
CloudBees is an enterprise software delivery platform (US, founded 2010) built on Jenkins, offering CI/CD, feature management, and release orchestration, with CloudBees Unify governing pipelines across hybrid and multi-cloud environments, serving Salesforce, Autodesk, and Visa.