Argo CD vs Flux CD
Argo CD
argoproj.github.io
Flux CD
fluxcd.ioSide by side
| Figure | Argo CD | Flux CD |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 1 |
| Spec score · Continuous Delivery Software | 8.8 (#3) | 8.5 (#8) |
| Spec score · Kubernetes Deployment Tools | 8.8 (#3) | 8.6 (#6) |
| Integrations | The feature list names GitHub, GitLab, Bitbucket, OIDC, OAuth2, LDAP, SAML 2.0, and Prometheus integrations or support. | The project lists GitHub, GitLab, Bitbucket, S3-compatible buckets, OCI, container registries, and CI workflow providers as supported integrations. |
| Purpose | Argo CD is a declarative GitOps continuous delivery tool for Kubernetes. | Flux is an open and extensible set of continuous and progressive delivery solutions for Kubernetes. |
| Security | The security documentation describes JWT authentication, RBAC authorization, TLS for network communication, and redaction of sensitive data in API payloads and logs. | The project describes a pull-based model, least-privilege access, and adherence to Kubernetes security policies as security design principles. |
| Support | The support guide directs users to documentation, FAQs, existing issues, the Argo CD Slack channel, and bug reports or feature requests. | Flux is a vendor-neutral CNCF project maintained by volunteers; 24/7 support, SLAs, hardened images, and private consulting are available through commercial vendors such as ControlPlane. |
Plans
In their own words
Argo CD
Argo CD is a free, open-source declarative GitOps continuous delivery tool for Kubernetes. It compares live applications with desired state in Git and can synchronize differences automatically or manually. Applications can use Kustomize, Helm, OCI images, YAML, JSON, Jsonnet or custom configuration-management plugins, and deploy across multiple clusters. A web UI and CLI expose application activity and deployment controls. Argo CD provides health analysis, drift detection, rollback to Git-committed configurations, audit trails and Prometheus metrics, plus PreSync, Sync and PostSync hooks for rollout workflows. Access features include SSO integrations, multi-tenancy and RBAC policies, with documented OIDC, OAuth2, LDAP, SAML 2.0, GitHub, GitLab, Microsoft and LinkedIn connections. Installation options include multi-tenant and Core setups; high availability is recommended for production. Core omits the Argo CD RBAC model, API, notification controller and OIDC authentication. Documentation also warns about privileged ApplicationSet access and Alpha or Beta compatibility risks.
Flux CD
Flux CD is a free, open-source set of continuous and progressive delivery tools for Kubernetes. It uses GitOps to reconcile clusters with configuration from sources such as Git repositories, and manages Kubernetes resources along with infrastructure and workload dependencies. Integrations include GitHub, GitLab, Bitbucket, S3-compatible buckets, OCI, container registries, Helm, and Kustomize. With Flagger, it supports canary deployments, feature flags, and A/B rollouts; it can also scan container images and push automated updates back to Git. Flux can send alerts to external systems, including chat systems such as Slack. For multi-tenancy, it uses Kubernetes RBAC through impersonation and supports multiple repositories and clusters. Its CLI and controller images are signed, and controller deployments follow the Kubernetes restricted pod security standard. Flux does not provide its own UI, although third-party interfaces are available. Installation requires cluster-admin rights, and older end-of-life Kubernetes versions are unsupported; the listed minimum versions begin at v1.34.1 for v1.34.