Live Production Cluster

KVM without
QEMU.
Zero bloat.

Production hypervisor stack. Direct KVM ioctls. XDP networking at 8µs. Live migration under 200ms. Open source, $0 license — forever.

Try live demo → curl | bash
8µs Network P50
1.8MB VMM binary
$0 License/year
caiman-vmm — vm-001 — ttyS0 ● LIVE
Interactive Demo

Real cluster.
Real VMs. Live now.

This is a live Caimán OS cluster running on real hardware. Create VMs, watch them boot, destroy them. No signup required.

Create VM
Session VMs: 0/2 Cluster: 0/10
Time left: 15:00 VMs auto-deleted on expiry
Cluster Nodes
Virtual Machines 0
Auto-refresh 5s
Why Caimán?

vs vSphere.

Feature Caimán OS VMware vSphere
Network latency P50 8µs (XDP zero-copy) ~100µs
Micro-segmentation latency 5µs (XDP native) ~50µs (NSX-T)
VMM memory per VM 1.8MB (no QEMU) ~250MB
Live migration blackout <200ms ~1-5s
License cost $0 / year $4,000–$10,000 / socket / year
QEMU dependency None N/A (proprietary)
Open source Apache 2.0 Proprietary
Kubernetes native Built-in CNI + scheduler Tanzu ($$$)
AI integration (MCP) Native None
Get Started

One command.
Production ready.

Works on CentOS 8+, Ubuntu 22.04+, Debian 12+. Requires x86_64 with VT-x or AMD-V.

Single-command install

$ curl -fsSL https://caimanos.com/install.sh | sudo bash ⎘

Click to copy

View on GitHub → Releases → Documentation →
Step 1
Install
Run the install script. Sets up kernel module, networking bridge, and pulls all container images.
Step 2
Create VMs
Use the dashboard or REST API to create VMs. Each one uses 1.8MB VMM memory. No QEMU.
Step 3
Scale
Add worker nodes with --role worker. DRS auto-balances. Live migrate with zero config.
Download

Any PC.
One ISO.

88MB bootable ISO. Works on x86_64 and aarch64 (ARM). Recycle any old PC into a KVM hypervisor. Boot from USB, follow the installer, get your admin token.

Caiman OS
Proxmox
ESXi
ISO Size
88 MB
1.2 GB
350 MB
License
$0 forever
$0 / $1500+
$0 / $5000+
ARM support
Yes
Partial
No
Min RAM
2 GB
2 GB
8 GB
🐊
Caiman OS v1.2.0
x86_64 + aarch64 (ARM) · BIOS + UEFI
LATEST
caiman-os-1.2.0-x86_64.iso
88 MB
178f5c71...b45dfde
↓ Download ISO Release notes →
FLASH TO USB
dd if=caiman-os-1.2.0-x86_64.iso of=/dev/sdX bs=4M status=progress
TEST WITH QEMU
qemu-system-x86_64 -cdrom caiman-os-1.2.0-x86_64.iso -m 4G -enable-kvm
Works on
Any x86_64 PCMac Mini (Intel)ThinkPad / LatitudeRaspberry Pi 4/5Mac Mini M1/M2 (ARM)AWS GravitonHetzner bare metalOVH / Contabo VPS