Argo CD vs Deployer

Argo CD is a declarative GitOps continuous delivery tool for Kubernetes. It uses Git repositories as the source of truth for desired application state and automates deployment to target environments. It compares running applications with that desired state, displays differences, and supports manual or automatic synchronization. The tool can deploy to multiple clusters and works with Kustomize, Helm, Jsonnet, plain YAML or JSON manifests, and configured custom configuration management tools. A web UI shows real-time application activity, while a CLI supports automation and CI integration. Access features include multi-tenancy, role-based controls, and single sign-on integrations such as OIDC, OAuth2, LDAP, SAML 2.0, GitHub, GitLab, Microsoft, and LinkedIn. It also provides access tokens, audit trails, and Prometheus metrics. Local accounts do not provide advanced features such as groups or login history; the documentation recommends SSO for those needs. Argo CD is free and open source with a self-managed installation. A common multi-tenant deployment serves multiple developer teams and is typically maintained by a platform team; the non-high-availability installation is not recommended for production.

Deployer is a PHP deployment tool for sending applications to servers. It switches releases through atomic symlinks, so a deployment does not expose an incomplete state, and a failed release can be reverted with one command. The command line can list releases and return to the latest good release. Tasks run concurrently across selected hosts by default, with an option to limit concurrency. Projects describe hosts and tasks in deploy.php or deploy.yaml files and may add custom build tasks. Recipes cover Laravel, Symfony, WordPress, Drupal, Magento, CakePHP, CodeIgniter, Yii, Contao, Shopware, TYPO3, and Sulu. Deployer connects over SSH, can open an interactive SSH session, and includes a recipe for provisioning Ubuntu with firewall, PHP, database, and HTTPS configuration. Installation is available through Composer, Phive, a PHAR bundle, or Docker. CI/CD guidance covers GitHub Actions, GitLab CI/CD, and Bitbucket Pipelines. It is free and open source, with Linux, macOS, API, and self-hosted options.