Three of the most popular virtualization/containerization platforms — Incus, Proxmox, and Docker — solve different problems. The wrong choice can mean months of operational pain. This comparison is honest: each platform wins in different scenarios, and we'll tell you exactly when.
Quick Overview
| Platform | Primary Use Case | Managed By | License |
|---|---|---|---|
| Incus | System containers + VMs, cloud/multi-tenant | Linux Containers community | Apache 2.0 |
| Proxmox VE | KVM hypervisor + LXC, on-prem homelab/enterprise | Proxmox Server Solutions GmbH | AGPLv3 + commercial |
| Docker | Application containers, developer workflows, CI/CD | Docker Inc. | Apache 2.0 (CE) |
Incus: Best for Cloud and APIs
Incus is the community-led fork of LXD (see our Incus vs LXD guide). It's designed as a cloud-like system where every operation is available via a REST API. Tenants are isolated via Incus projects — each project gets its own network namespace, storage quota, and CPU/memory limits.
Incus strengths:
- Full REST API for everything — build automation, cloud platforms, CI/CD on top of it
- System containers start in 1–2 seconds (much faster than VMs)
- Native multi-tenant with per-project isolation — designed for shared hosting
- OIDC authentication, RBAC, cluster federation built-in
- Runs on any Linux distro — not Ubuntu-only
- OVN networking — software-defined, multi-cluster capable
Incus weaknesses:
- No built-in web UI (you use a web interface built on top, like VeloxaHost)
- Steeper learning curve than Proxmox's polished GUI
- Smaller ecosystem than Docker (no image registry, no Compose equivalent)
Choose Incus when: You're building a cloud platform, need API-driven automation, or run multi-tenant infrastructure. This is what VeloxaHost runs on.
Proxmox: Best for On-Prem and Homelabs
Proxmox VE (PVE) is a mature hypervisor built on KVM and LXC. It has a polished web UI, and most operations can be done in a browser. It's widely loved in homelabs and on-premises deployments.
Proxmox strengths:
- Excellent web UI — every feature is one or two clicks away
- Native Ceph integration for distributed storage
- SDN (VXLAN) built into newer versions
- PCIe passthrough for GPU workloads
- Active community (Reddit r/homelab loves it)
- Enterprise subscription available for commercial support
Proxmox weaknesses:
- API exists but is not designed as a primary interface — it's supplementary
- Multi-tenant isolation is manual — not designed for public cloud use
- Debian-first (works best on Debian)
- LXC support is secondary to KVM
Choose Proxmox when: You're managing physical servers on-premise, self-hosting services in a homelab, or running KVM VMs with GPU passthrough. Not suited for building a cloud service on top of.
Docker: Best for App Containers and CI/CD
Docker's primary job is running application containers — single-process, OCI-format, layered-image workloads. The ecosystem (Docker Hub, Compose, Swarm, Kubernetes compatibility) is massive.
Docker strengths:
- Enormous ecosystem — millions of images on Docker Hub
- Docker Compose for multi-service apps
- Dockerfile = reproducible, version-controlled builds
- First-class CI/CD support (GitHub Actions, GitLab CI all have Docker runners)
- Drop-in replacement path to Kubernetes (same OCI images)
- Best developer experience for local development
Docker weaknesses:
- Not designed for multi-tenancy — security boundaries between containers are weaker than VMs or Incus projects
- No built-in hypervisor — can't run VMs
- Application containers are not system containers — no init, no SSH, no systemd
- Docker Desktop licensing changed — commercial use requires a paid subscription for large companies
Choose Docker when: Your team builds microservices, your deployment target is Kubernetes, or you need a strong local dev toolchain. Don't use it for multi-tenant infrastructure or system-level workloads.
Full Comparison Table
| Feature | Incus | Proxmox | Docker |
|---|---|---|---|
| System containers (full OS) | ✅ Primary | ✅ Secondary | ❌ |
| VMs (KVM/QEMU) | ✅ | ✅ Primary | ❌ |
| App containers (OCI) | ❌ (run Docker inside) | ❌ (run Docker inside) | ✅ Primary |
| REST API first | ✅ | Partial | ✅ |
| Web UI built-in | ❌ (3rd party) | ✅ Polished | ❌ (Docker Desktop) |
| Multi-tenant isolation | ✅ Projects | Partial | ❌ |
| Cluster support | ✅ | ✅ | Swarm (deprecated) |
| Storage (ZFS/Ceph) | ✅ ZFS, LVM, Ceph | ✅ ZFS, Ceph, LVM | Volume drivers |
| GPU passthrough | Partial | ✅ Full PCIe | nvidia-docker only |
| Developer experience | Good | Ops-focused | ✅ Excellent |
| Image ecosystem | linuxcontainers.org | Turnkey.linux | ✅ Docker Hub |
Can You Mix Them?
Yes — and many production setups do:
- Incus + Docker inside: Run Docker inside an Incus system container. Get the OS-level isolation of Incus with full Docker tooling inside. This is how VeloxaHost users run Docker-based apps.
- Proxmox + Docker inside VMs: Standard homelab setup — Proxmox manages VMs, Docker runs inside each VM.
- Incus + Proxmox: Not common — they compete for the same role. Pick one for a given cluster.
Verdict
- Building a cloud/SaaS on shared infrastructure? → Incus
- Running physical servers on-prem with a GUI? → Proxmox
- Microservices, CI/CD, Kubernetes? → Docker
- Multi-tenant with Docker workloads? → Incus with Docker inside
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