城下町 · CLUSTER ONLINE

Sovereign Kubernetes.
Bare-metal economics.

Production Kubernetes on Hetzner cloud and bare-metal, anywhere. Read the architecture, see the plans, or push some code.

100%open source
1managed customer
0sales calls
§ WHAT WE DO

Production Kubernetes,
off the hyperscalers.

You can achieve highly available clusters without locking yourself to a public cloud, and without staffing a dedicated senior DevOps team. The CNCF community has provided building blocks for a well-run cluster over the better part of a decade. We curate, package, and either run it for you — or hand you the keys.

HETZNER

Hetzner cloud VMs and dedicated servers

Hetzner is a German operator with datacentres in Germany, Finland, the US, and Singapore — privately held by its founder, GDPR-compliant by jurisdiction, and serving roughly 425,000 customers. They’ve been the price/performance benchmark in European hosting for over two decades and has gained its reputation in production, not by ad spend.

HIGH AVAILABILITY

Production-grade by default

Multi-zone control planes, automated upgrades, backups, monitoring, alerting, secrets rotation, RBAC scoped per workload, network policies. The CNCF community has spent the better part of a decade working out what a well-run Kubernetes cluster looks like — we propagate that recipe, refined through years of tinkering, to every cluster we run.

PORTABLE

Free, open-source software

Bootstrap scripts, Helm charts, kubenix management, operators — every line we run in production is publicly released and well-documented. Run it yourself if you’d rather, take it with you if you outgrow us. Built on a deliberately narrow cloud surface — VMs, virtual networks, storage volumes, load balancers — a recipe for portability. Hyperscalers offer a broader catalogue and bill for the convenience. We trade the proprietary catalogue for an open-source stack, and keep migration to another provider, or to a hybrid setup, on the roadmap.

AGENTIC

KAOS — agentic operator

KAOS — the Kubernetes Agentic Operator Substrate — observes your cluster and proposes (or applies) changes under guardrails you configure and control. High-stakes or unfamiliar decisions pause for approval, with one-click escalation to an experienced human operator on call. Every decision streamed to the dashboard with the reasoning behind it.

Run Kubernetes where you choose.

Managed production clusters on Hetzner,
open-source platform you can take with you,
and operators on call — human, agentic, or both.