Argo Rollouts vs Google Cloud Deploy

Argo Rollouts is a self-hosted Kubernetes controller for managing how application updates reach users. It supports BlueGreen, Canary and Rolling Update strategies, with weighted traffic shifting through ingress controllers or service meshes. Without a traffic-routing provider, it can adjust ReplicaSet counts instead. Metric integrations let it assess KPIs and automate promotion or rollback, while leaving room for manual judgment. Supported providers include NGINX, AWS ALB, Istio and Traefik for traffic, and Prometheus, Datadog, New Relic, Graphite and InfluxDB for metrics. It can operate independently of Argo CD and respond to Kubernetes manifest changes whether they come from GitOps or traditional CI/CD. Each cluster running Rollout workloads needs its own controller and CRD; a Rollout specification covers one application, not dependencies among applications. Shared-resource or worker-queue applications may be a poor fit, and infrastructure applications are not recommended. Argo Rollouts is free and open source. It runs on Linux, macOS, Windows or self-hosted environments.

Google Cloud Deploy automates application delivery through an ordered set of target environments. It deploys to Google Kubernetes Engine, Cloud Run, GKE attached clusters, and custom targets, with releases promoted or rolled back through the web console, CLI, or API. Deployment options include canary and parallel rollouts, verification, deploy hooks, and automated promotion. IAM roles and conditions determine which authenticated users and service accounts can act. Cloud Audit Logs and Cloud Logging support audit trails and platform logs. Teams can invoke the service from CI through its CLI or API, including documented GitHub Actions and GitLab connections. Skaffold and Cloud Build render and deploy manifests, alongside artifact repositories and testing or workflow tools. The first active multiple-target pipeline each month costs nothing; each additional active multiple-target pipeline costs $5 a month per billing account. Underlying services may add charges. The regional system limit is 18,000 API requests per minute.