Proxmox or kldloadOS.
Both run on bare metal. Both support KVM/QEMU. Both have ZFS. Both target homelabs and self-hosted infrastructure. But they're solving different problems, and you should pick one — not run both.
The honest take: If you want to spin up VMs through a polished GUI with minimal expertise, Proxmox is mature and it works. Use it.
If you want a proper foundation — ZFS all the way down, kernel-level observability, direct GPU access, no vendor costs, fully auditable bash scripts — keep reading.
What they are
Proxmox VE
A hypervisor platform. Its entire identity is managing VMs and LXC containers through a web UI. The OS underneath is Debian, heavily modified and locked to Proxmox's tooling. ZFS is a storage option — not the foundation.
kldloadOS
A Linux construction kit. You pick your distro (CentOS, Debian, Rocky, RHEL, or five more), root it in ZFS, and build whatever you need on top. You're not locked into any management paradigm — you own the entire stack.
The comparison
| Proxmox VE | kldloadOS | |
|---|---|---|
| ZFS | Storage option. Bolted on. Boot environments not native. | The substrate. Boot environments, snapshots before every package change, ZFS-backed containers. Not an option — the foundation. |
| Cost | Free tier exists. Enterprise repo ~€110/year/socket. Nag screen on the free version. | BSD-3-Clause. Zero. Forever. No nag screen, no phone home, works fully air-gapped. |
| Distro choice | Debian only (modified). You get what Proxmox gives you. | 10 distros. CentOS, Debian, Rocky, RHEL, Ubuntu, FreeBSD, OpenBSD, GhostBSD, illumos, Windows. Your call. |
| NVIDIA GPU | PCI passthrough to VMs. Known pain point — IOMMU groups, driver conflicts, single-VM binding. | Drivers installed on first boot. Direct access. No VM layer needed for GPU workloads. Container GPU sharing native. |
| Observability | No native eBPF story. Basic stats in the UI. Need external tools (Grafana, Datadog) for anything deeper. | eBPF ships on first boot — execsnoop, tcplife, opensnoop, biolatency, bpftrace. Kernel-level observability without a SaaS invoice. |
| WireGuard | Supported. Manual setup. | DKMS module available on first boot. Mesh networking patterns documented. |
| Containers | LXC with Proxmox's management layer. Storage is whatever you configure. | Docker, Podman, and LXC on ZFS. Copy-on-write storage, instant snapshots, transparent compression under every container natively. |
| Kubernetes | Not really a K8s platform. You'd run K8s inside Proxmox VMs. | K8s on KVM on ZFS — a serious production architecture. Documented end to end. |
| AI | None. | Built-in local AI assistant. Ollama + whisper.cpp, voice-controlled, trained on its own documentation. Runs on your hardware — no cloud, no API key. |
| Web UI | Excellent. Mature. The best thing about Proxmox. | Functional installer UI. Not the centerpiece — the terminal is. |
| Offline install | Needs internet for most operations beyond base install. | Full RPM and APT package mirrors baked into the ISO. No internet required. |
| Auditability | Perl + custom daemons. Good luck reading pvemanager. | 100% bash. One Python file. cat any file and read what it does. |
| Community | Years of production deployments, large community, enterprise support contracts. | New. Growing. The code is public and the docs are thorough. |
When to pick Proxmox
You want a turnkey VM management platform with a polished web UI. You don't need to understand the internals — you need VMs running, and you need them now. You're comfortable with Debian as your only option. You have budget for support contracts or you're fine with the community forums.
When to pick kldloadOS
You want to understand what's under you. You want ZFS as the substrate, not an afterthought. You want kernel-level observability without paying for SaaS. You want direct GPU access without fighting IOMMU. You want to deploy offline, air-gapped, or in environments where phoning home isn't an option. You want to read every script that runs on your hardware.
Our recommendation
Pick one. Don't run both.
Proxmox and kldloadOS are both opinionated about how infrastructure should work. Running them side by side creates confusion, not flexibility. Proxmox manages your VMs. kldloadOS teaches you how infrastructure actually works — then gets out of your way.
If you're reading this site, you probably already know which one you want.