The top GitOps tools include Argo CD, Flux CD, Jenkins X, GitLab, Codefresh, Harness GitOps, Spinnaker, Octopus Deploy, Northflank, and GitOpsHQ. Argo CD and Flux CD are considered the most popular open-source Kubernetes-native GitOps platforms because they provide automated deployments, rollback support, declarative infrastructure management, Git-based version control, multi-cluster operations, RBAC security, and smooth CI/CD integrations. GitLab, Harness, and Codefresh are widely preferred by enterprise DevOps teams because they combine GitOps with complete CI/CD, governance, observability, compliance, and policy enforcement features. Spinnaker and Octopus Deploy are commonly used for hybrid and multi-cloud delivery pipelines, while Jenkins X is suitable for Kubernetes-focused automation with built-in CI/CD workflows. Northflank and GitOpsHQ focus on platform engineering, developer productivity, and large-scale cloud-native operations with advanced governance and multi-cluster management. Startups usually prefer Argo CD or Flux CD because they are open-source, cost-effective, and easier to implement, whereas large enterprises choose Harness, GitLab, or Codefresh for better scalability, analytics, enterprise support, and advanced security controls.