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Operating Systems · head to head

Qubes OS vs Ubuntu

Qubes OS logo

Qubes OS

Operating Systems

Security-focused operating system that runs each activity in its own virtual machine

From
Free
Rated
-
Full reviewWebsite
Ubuntu logo

Ubuntu

Operating Systems

Enterprise Linux distribution with 15-year support options.

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Qubes OS hardware compatibility is the first and usual failure: an IOMMU is mandatory, and most business laptops fail on wifi passthrough, firmware quirks or suspend even when the CPU supports virtualisation.; Ubuntu free version supported only by community; no official Canonical support without Pro subscription
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Qubes OS and Ubuntu actually diverge.

Attributes where Qubes OS and Ubuntu differ
AttributeQubes OSUbuntu
Pricing modelOpen source, no licence feefreemium
Platformsx86-64 laptops and desktops with VT-d or AMD-ViDesktop, Server, Cloud, IoT, Edge, WSL

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Operating Systems).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Qubes OS

  • Compartmentalisation by VM
  • Disposable qubes
  • Template model
  • Isolated device drivers
  • Whonix integration
  • Anti-evil-maid

Only in Ubuntu

Nothing recorded that Qubes OS does not also cover.

What people use each for

The jobs each tool is most often brought in to do.

Qubes OS

  • Journalists opening attachments and documents from sources who cannot be verifiednot Ubuntu
  • Security researchers detonating samples on the same machine they use for ordinary worknot Ubuntu
  • Consultants and lawyers who must keep several clients cryptographically separate on one laptopnot Ubuntu
  • People whose threat model includes targeted attacks rather than commodity malwarenot Ubuntu

Ubuntu

  • Individual developers and small teams using free Ubuntu for laptops and serversnot Qubes OS
  • Cloud and data centre deployments requiring certified, supported Linux operating systemnot Qubes OS
  • Organisations needing FIPS-certified or DISA-STIG-hardened Linux for government and regulated environmentsnot Qubes OS
  • AI and machine learning teams using Ubuntu Desktop with pre-optimised toolchainsnot Qubes OS
  • IoT and edge computing deployments using Ubuntu Corenot Qubes OS

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Qubes OS

  • Hardware compatibility is the first and usual failure: an IOMMU is mandatory, and most business laptops fail on wifi passthrough, firmware quirks or suspend even when the CPU supports virtualisation.
  • There is no GPU acceleration inside qubes, so video conferencing, media playback, 3D work and games are poor to unusable, and this rules the system out for most general-purpose users.
  • Memory is consumed per qube, so 16GB is the working floor and a normal day with a browser, email, work and a disposable qube open will exhaust an 8GB machine.
  • Battery life is substantially shorter than the same laptop running a conventional Linux install, because several VMs and their drivers are running continuously.
  • Backups are whole-VM images rather than files, so restores are slow, storage requirements are large, and pulling a single document out of a backup is more work than it should be.

Ubuntu

  • Free version supported only by community; no official Canonical support without Pro subscription
  • Ubuntu Pro required for enterprise compliance certifications (FIPS, DISA-STIG); free version does not include these
  • Ubuntu Pro pricing is proprietary and varies based on cloud deployment (AWS, Azure, GCP); no published per-machine or per-user pricing
  • Ubuntu Pro + Support adds 24/7 support costs on top of base subscription; total cost for enterprise-grade support not transparent
  • Personal/free tier limited to 5 machines; any larger deployment requires paid enterprise subscription

Pricing, plan by plan

Qubes OS

Free
  • Qubes OSFree
    • No licence fee
    • All templates and features included
    • Community support via forum and mailing lists

Ubuntu

Free
  • Ubuntu (Free)Free
    • Desktop, Server, Core and Cloud editions
    • Community support
    • Standard security updates (5 years LTS)
  • Ubuntu Pro (Personal)Free
    • Extended Security Maintenance (10 years)
    • Kernel Livepatch
    • Landscape management
  • Ubuntu Pro (Enterprise)$undefined/variable
    • 10 years Extended Security Maintenance
    • FIPS 140, DISA-STIG, CIS compliance
    • Kernel Livepatch
  • Ubuntu Pro + Support$undefined/variable
    • All Ubuntu Pro features
    • 24/7 break-fix and bug-fix support
    • Expert assistance for infrastructure and applications

Which should you pick?

Choose Qubes OS if

  • You need compartmentalisation by vm.
  • You want to start without paying.
  • You work on x86-64 laptops and desktops with VT-d or AMD-Vi.
  • You also want disposable qubes.
Qubes OS review

Choose Ubuntu if

  • You want to start without paying.
  • You work on Desktop, Server, Cloud, IoT, Edge, WSL.
Ubuntu review

Questions people ask

Is Qubes OS or Ubuntu better?
Neither clearly leads. Qubes OS starts at Free and Ubuntu at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Qubes OS or Ubuntu?
Qubes OS starts at Free and Ubuntu at Free.
Does Qubes OS or Ubuntu run on more platforms?
Qubes OS runs on x86-64 laptops and desktops with VT-d or AMD-Vi. Ubuntu runs on Desktop, Server, Cloud, IoT, Edge, WSL.
Can I use Qubes OS for free?
Both have a free tier, so you can try either at no cost before committing.
What is Qubes OS best used for?
Qubes OS is most often used for journalists opening attachments and documents from sources who cannot be verified, security researchers detonating samples on the same machine they use for ordinary work, consultants and lawyers who must keep several clients cryptographically separate on one laptop, people whose threat model includes targeted attacks rather than commodity malware. Of those, journalists opening attachments and documents from sources who cannot be verified and security researchers detonating samples on the same machine they use for ordinary work are not what Ubuntu is typically brought in for.
What can Qubes OS do that Ubuntu cannot?
Qubes OS covers Compartmentalisation by VM, Disposable qubes, Template model, Isolated device drivers.

Answered from the vendors’ own pages

Qubes OS: Will it run on my laptop?

Check the hardware compatibility list first, and prefer a certified model. VT-x or AMD-V alone is not enough; you need VT-d or AMD-Vi as well, and many consumer machines either omit it or implement it badly.

Ubuntu: Is Ubuntu free?

Yes. Ubuntu is free to download and use in all editions. Community support is also available at no cost. Ubuntu Pro subscriptions are optional and provide extended support and compliance tools.

Source
Qubes OS: Can I run Windows in a qube?

Yes, with Qubes Windows Tools, but the integration is less complete than the Linux templates and has historically broken across Windows updates. Treat it as a workaround, not a supported desktop.

Ubuntu: How long is Ubuntu LTS support?

Standard Ubuntu LTS releases receive 5 years of security maintenance. Ubuntu Pro extends this to 10 years, expandable to 15 years with the Legacy add-on.

Source
Qubes OS: How much RAM do I actually need?

16GB to work comfortably, 32GB if you keep many qubes running. The published minimum will boot the system but not support a normal working day.

Ubuntu: What compliance certifications does Ubuntu Pro provide?

Ubuntu Pro provides compliance tools for FIPS 140, DISA-STIG, CIS, FedRAMP and PCI-DSS standards.

Source
Qubes OS: Is it usable as an only computer?

For text, email, browsing and code, yes. For video calls, media production or anything needing a GPU, no, and most users keep a second machine for those tasks.

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