Flux CD vs Upsun (formerly Platform.sh)
Flux CD
fluxcd.io
Upsun (formerly Platform.sh)
upsun.comSide by side
| Figure | Flux CD | Upsun (formerly Platform.sh) |
|---|---|---|
| Price from | Free | €9/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | — | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 1 | 2 |
| Spec score · Deployment Automation Software | 8.6 (#6) | 7.9 (#21) |
| Founded | 2016 | 2015 |
| Integrations | The project lists GitHub, GitLab, Bitbucket, S3-compatible buckets, OCI, container registries, and CI workflow providers as supported integrations. | Native source integrations include GitHub, GitLab, and Bitbucket, while activity scripts include utilities for HTTP requests, Slack, and Jira. |
| Product | Flux is a set of open and extensible continuous and progressive delivery solutions for Kubernetes. | Upsun describes itself as a self-service, fully managed, secure, developer-focused PaaS for building and running applications. |
| Security | The project describes a pull-based model, least-privilege access, and adherence to Kubernetes security policies as security design principles. | Upsun lists read-only application filesystems, DDoS protection, automated TLS certificates, multifactor authentication, and a web application firewall among its security features. |
| Support | 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. | Upsun describes its support team as globally distributed and available 24x7; the pricing page lists standard, advanced, and premium support options. |
Plans
Upsun (formerly Platform.sh)
- Start for freeFree
- Upsun Cloud pay-as-you-go€9 a month
In their own words
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.
Upsun (formerly Platform.sh)
Upsun, formerly Platform.sh, is a self-service managed platform for building and running applications. It is aimed at development teams and offers project management through a CLI, Console, and REST API. The platform supports ten programming languages, including Node.js, Python, and PHP, as well as frameworks such as Django, Express, Symfony, and Strapi. Teams can create on-demand preview environments that copy production configuration, code, and data. Upsun Cloud can deploy to AWS, Azure, Google Cloud, IBM Cloud, and OVHcloud. Each project has two automated backups per day and two manual backups available for recovery. Listed security features include read-only application filesystems, DDoS protection, automated TLS certificates, multifactor authentication, and a web application firewall. The Trust Center lists PCI Level 1, HIPAA, SOC 2 Type 2, and ISO 27001 among its certifications and standards. A 15-day free trial begins without a credit card and includes a monthly credit covering one project fee and one user license. Pay-as-you-go pricing starts at €9.00 per project per month; resources are billed separately based on provisioned usage.