1VMTool vs Colima
Colima is a container runtime that happens to use a virtual machine. 1VMTool is a virtualization app whose managed Docker engine is new and narrower. The overlap is thinner than the shortlist suggests.
Side by side
| 1VMTool | Colima | |
|---|---|---|
| Containers | A managed Docker engine since 0.3.0 — private socket, Compose-grouped workspace — running inside a VM it owns. No Kubernetes. | The entire point — Docker CLI, Compose and Kubernetes. |
| Snapshot mechanism | APFS clone of the disk bundle. Take and restore in well under a millisecond, independent of disk size. | Not a machine-snapshot product. |
| macOS guests | Supported. | None. |
| Windows guests | Experimental first-party engine. | None. |
| Price | One-time purchase. | Free under MIT, with no revenue conditions. |
| Interface | GUI and CLI as peers. | CLI only. |
| Bundled dependencies | None. | Lima, and QEMU where Lima needs it. |
| Open source | Closed source. | MIT. |
Highlighted cells mark the stronger side of each row. Competitor details checked September 2026 against vendor documentation — pricing and features move, so verify anything decision-critical at the source.
When you should stay on Colima
Your job is containers. Colima gives you the Docker CLI, Compose and optional Kubernetes on macOS with far less overhead than Docker Desktop and no licensing conditions at all. 1VMTool ships a managed Docker engine now, but it is one Debian VM inside a virtualization app — for a container-first job Colima is the purpose-built, free answer.
Where Colima frustrates people
- It is a container runtime, not a virtualization app. The Lima VM underneath is plumbing you are not meant to manage.
- No macOS guests and no Windows guests.
- No snapshots of the machine, no rollback, no snapshot tree.
- You inherit Lima's constraints, including the trade-off between the fast Apple backend and the features only the QEMU backend provides.
Why someone moves to 1VMTool
- You need a real virtual machine with its own disk rather than a container host.
- You need macOS or Windows guests.
- You want snapshots and rollback to be first-class.
- You want a desktop app rather than a CLI over a hidden VM.
Frequently asked questions
Should I replace Colima with 1VMTool?
Not for containers. Since 0.3.0 1VMTool has a managed Docker engine — a real socket the host CLI talks to, with a Compose-aware workspace — but no Kubernetes, and it is Docker inside a VM it provisions. Colima is free, light and purpose-built for that job.
What is the difference between Colima and Lima?
Colima wraps Lima to make containers the default experience — Lima starts containerd, Colima starts Docker and can add Kubernetes. Colima is the friendlier front end to the same underlying VM machinery.
Can Colima run a macOS or Windows VM?
No. It runs a Linux VM to host containers. For macOS guests look at 1VMTool, VirtualBuddy, UTM, Parallels or Tart.
Try it against your own workflow
The limits are stated on every screen before you commit to anything, which is the fastest way to find out whether this is your tool.