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Qubes OS A reasonably secure operating system Download & Install Version 4.3.0

What others are saying

"If you're serious about security, @QubesOS is the best OS available today. It's what I use, and free."
"SecureDrop depends on Qubes OS for best-in-class isolation of sensitive workloads on journalist workstations. Providing journalists with a sane way to handle untrusted content from unknown sources is part of our job, and Qubes gives us the tools we need to do that job well."
"When I use Qubes I feel like a god. Software thinks that it's in control, that it can do what it wants? It can't. I'm in control."
"Qubes OS gives us greater confidence in the security of systems being used to remotely access our servers, mainly because powerful physical and logical privilege separation between workspaces allows our engineers to select appropriate degrees of isolation for different processes."
More endorsements

Media & Press

"The world's most secure operating system assumes you've been owned."
"For those willing to put in the effort, Qubes is more secure than almost any other operating system available today."
"So Rutkowska flipped the game, this time in favor of the defenders."
More Media & Press

News & Announcements

  • Qubes OS 4.3.0 has been released! Posted in Releases on 2025-12-21
  • Qubes Canary 045 Posted in Security on 2025-12-10
  • Qubes OS 4.3.0-rc4 is available for testing Posted in Releases on 2025-12-06
  • The Qubes OS Project will be at FOSDEM 2026! Posted in Announcements on 2025-11-16
  • Fedora 41 approaching end of life Posted in Announcements on 2025-11-05
  • Debian 13 templates available Posted in Announcements on 2025-10-30
  • Qubes OS 4.3.0-rc3 is available for testing Posted in Releases on 2025-10-27
  • More News & Announcements

What's Inside of Qubes?

Secure Compartmentalization

Qubes brings to your personal computer the security of the Xen hypervisor, the same software relied on by many major hosting providers to isolate websites and services from each other. Learn more

Operating System Freedom

Can't decide which Linux distribution you prefer? Still need that one Windows program for work? With Qubes, you're not limited to just one OS. Learn more

Serious Privacy

With Whonix integrated into Qubes, using the Internet anonymously over the Tor network is safe and easy. Learn more

Research

  • Qubes virtual mini-summit 2021 3mdeb and the Qubes team, August 2021
  • Qubes Air: Generalizing the Qubes Architecture Joanna Rutkowska, January 2018
  • Introducing the Next Generation Qubes Core Stack Joanna Rutkowska, October 2017
  • Introducing the Qubes Admin API Joanna Rutkowska, June 2017
  • Thoughts on the "physically secure" ORWL computer Joanna Rutkowska, September 2016
  • Security challenges for the Qubes build process Joanna Rutkowska, May 2016
  • Read More Research

Partners

  • Mullvad
  • Freedom of the Press Foundation
  • Invisible Things Lab
  • We would love for you to fund or partner with us

Join the Community!

Have questions or need a hand? As a free and open-source project, our valued community of users and contributors from around the world are in the best position to help. Before diving in, we encourage you to read about staying safe, our discussion guidelines, and our code of conduct to help keep things positive and on-track. We welcome newcomers and returning users wanting to discuss Qubes and seeking to contribute. Visit the Qubes Forum

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