OpenNebula
Spanish open-source platform for private and edge cloud, managing KVM, LXC and Firecracker across multiple sites from one control plane
Quick Overview
| Company | OpenNebula Systems |
|---|---|
| Category | Virtualization |
| Headquarters | Madrid, Spain |
| Founded | 2008 |
| EU Presence | Yes - Spain (EU) |
| Data Location | Your own infrastructure |
| Open Source | Yes (Apache 2.0) |
| GDPR Compliant | Yes |
| Self-Hosting | Yes - self-hosted only |
| Main Features | Multi-hypervisor (KVM, LXC, Firecracker), multi-site edge clusters, Kubernetes support, multi-tenancy, hybrid cloud bursting, VMware import |
| Pricing | Free (Community Edition) / Enterprise subscription pricing on request |
| Best For | Distributed and edge infrastructure, or private cloud with real multi-tenancy |
| Replaces | VMware vCloud, OpenStack, Nutanix |
Detailed Review
OpenNebula is a different proposition from the hypervisor managers it is usually compared with. It is a cloud orchestrator: designed for multiple sites, multiple tenants and multiple virtualisation technologies, with a much lighter operational footprint than OpenStack.
It has been developed in Madrid since 2008 and is used across European research institutions, telecommunications operators and hosting providers — anywhere the requirement is distributed infrastructure rather than a single data centre.
Multi-Site and Edge
The platform is built around the idea that your infrastructure is not all in one room. It manages geographically distributed clusters from one control plane, provisions edge nodes automatically, and supports lightweight virtualisation through Firecracker microVMs alongside conventional KVM.
For telecommunications and IoT workloads that need compute close to users, that design is the reason to choose OpenNebula over a single-site hypervisor manager.
Multi-Tenancy Done Properly
OpenNebula was built for service providers, so users, groups, virtual data centres, quotas and resource isolation are first-class concepts rather than bolted on. Hosting companies and universities providing infrastructure to internal departments get a working self-service model without building it themselves.
Lighter Than OpenStack
The most common practical comparison is with OpenStack, and OpenNebula's pitch is honest: far fewer moving parts, a much smaller operations team required, and an installation measured in hours rather than weeks. The trade-off is a narrower feature surface than a full OpenStack deployment offers.
It also supports importing VMware workloads, so an organisation can migrate off vSphere and land in a cloud-style platform rather than a like-for-like hypervisor replacement.
Limitations to Consider
OpenNebula is more platform than appliance: it expects you to think in terms of cloud abstractions, and a team that simply wants a vSphere replacement for twenty VMs will find Proxmox VE considerably more direct. The community is smaller, third-party integrations are fewer, and enterprise pricing is quoted rather than published.
Who Should Use OpenNebula
Telecommunications operators, research institutions, hosting providers and any organisation with distributed or edge infrastructure that needs multi-tenancy and multi-site orchestration without the operational weight of OpenStack.
Pros and Cons
Pros
- Genuine multi-site and edge orchestration
- Multi-tenancy built in from the start
- Much lighter to operate than OpenStack
- Supports KVM, LXC and Firecracker
- Apache 2.0, Spanish vendor
Cons
- Overkill for a small single-site estate
- Smaller community and ecosystem
- Enterprise pricing not published
Alternatives to OpenNebula
Other European virtualization worth comparing before you decide:
Proxmox VE
Austria · Open-source KVM and LXC virtualisation with built-in clustering
XCP-ng
France · Open-source Xen hypervisor with Xen Orchestra management
SUSE Virtualization
Germany · Hyperconverged infrastructure built on Kubernetes and KubeVirt
Canonical OpenStack
United Kingdom · Fully supported OpenStack private cloud
See all European virtualization or compare them directly against VMware vCloud on our alternatives page.
Frequently Asked Questions
OpenNebula has far fewer components and can be installed and operated by a much smaller team — hours rather than weeks to a working cloud. OpenStack offers a broader feature surface if you have the staff to run it.
It can be, and it supports importing VMware workloads. But it is a cloud orchestrator rather than a hypervisor manager, so it fits best where you want multi-tenancy or multi-site capability rather than a direct vSphere swap.
Yes, that is one of its strongest areas: distributed clusters managed from one control plane, automatic edge node provisioning and Firecracker microVMs for lightweight workloads.
The Community Edition is free and open source under Apache 2.0. An enterprise subscription adds support and certified builds, with pricing quoted per deployment.