PrivacyTools.io
Reviewed by Marco Wollank
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Replace today: Windows macOS

Privacy Friendly Operating Systems

Private alternatives to Windows, macOS, vetted against our public criteria.

Grouped by threat level

Covered Easy start and good defaults for everyone
Hardened Some setup and real gains for the willing
#1
secureblue logo

secureblue

secureblue is a security-hardened immutable Linux OS built on Fedora Atomic Desktops. It ships as OCI bootable container images and applies kernel hardening, a hardened memory allocator from GrapheneOS, and a hardened Chromium browser called Trivalent.

#2
Kicksecure logo

Kicksecure

Kicksecure is a security-hardened Debian-based Linux distribution that applies a broad set of kernel and userspace hardening settings out of the box, reducing the attack surface without requiring manual configuration. It also serves as the foundation for the Whonix anonymity OS.

#4
NixOS logo

NixOS

NixOS is a Linux distribution built entirely on the Nix package manager, where the whole system (kernel, packages, services, and configuration) is declared in a single set of files. Upgrades are atomic and fully reproducible rollbacks are a built-in feature.

Targeted Maximum effort for when you're a target

How they compare

Tool Base Based in Cost
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Qubes OS
Xen Poland Free
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Tails
Debian · Free
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Whonix
Debian · Free
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secureblue
Fedora · Free
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Kicksecure
Debian · Free
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Fedora Atomic Desktops
Fedora · Free
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NixOS
Independent Netherlands Free
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Fedora Workstation
Fedora · Free
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Arch Linux
Independent · Free
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openSUSE Tumbleweed
Independent Germany Free
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Ubuntu
Debian United Kingdom Free
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macOS
Darwin United States ·

Mainstream desktop systems treat you as a data source by default, with telemetry you can reduce but never fully switch off. The operating systems here put privacy first instead, ranging from a friendly daily Linux to an amnesiac system that forgets everything at shutdown. There is no single best answer, because the right system depends on what you are protecting against. Pick the one that matches how much you need to hide, and run it as your real machine rather than a project.

Why you can’t just turn off tracking in a mainstream OS

A mainstream desktop system collects data because that is how it is built, not because of a setting you missed. The telemetry hooks live inside the operating system itself, below the apps and below the privacy panel, so the switches you are offered govern the edges while the core keeps reporting. Each update can quietly reset those toggles or add new collection, because the company writing the OS is the same one that benefits from the data. You are negotiating with the landlord. The only way out is an operating system whose makers do not want your data in the first place, which is what every open-source pick on this page is designed around.

How we pick these

We measure each system against our public listing criteria with privacy as the floor, not a feature. That means no telemetry and an open-source core that you or independent researchers can audit, with control over when updates install rather than a vendor pushing them on its own schedule. We also weigh the practical layer, because a private system you abandon is worth nothing: it needs a long support window and solid hardware support, with a sane upgrade path. For the high-security options we look harder at how they isolate tasks or route traffic, since those claims carry the most weight. We only list a system we would run ourselves.

A spectrum, not one answer

These systems range widely, and the difference is the first thing to understand. Everyday distributions like Fedora Workstation and Ubuntu give you a private, telemetry-free daily driver with familiar apps and a gentle learning curve. Amnesiac systems like Tails run from a USB stick and forget everything when you power off, built for high-risk work on a machine you do not control. Compartmentalised systems isolate each task in its own sandbox, so a compromise in one place cannot reach the rest. Choose by your real threat model, not by what sounds most hardcore, because the heaviest system is the one you are most likely to quit.

What to look for in an operating system

Start with the non-negotiables: no telemetry and an open-source core that can be audited, plus control over update timing so a vendor cannot change your system out from under you. Then weigh what makes it livable: a long support window and good hardware support so daily use is smooth, backed by an active community to lean on when something breaks. For the high-security options, look closely at how they sandbox tasks or route traffic, since that isolation is the whole point of choosing one. A system that is private but painful gets abandoned, and an abandoned system protects no one.

How to switch

Try any of these from a live USB first, with zero changes to your machine, which is the safest way to judge whether your hardware is supported. Back up your files, then dual-boot the new system alongside your current one while you find replacements for the apps you rely on. Move your daily work over gradually, and keep the old system only for the one or two programs that genuinely need it. If you are leaving Microsoft’s OS specifically, our Windows alternatives page frames the move, and the broader escape Microsoft playbook covers the rest of the ecosystem.

Frequently asked

Which private operating system should I start with?
For everyday use, a mainstream Linux distribution gives you a private, telemetry-free daily driver that still feels familiar. Reach for an amnesiac or compartmentalised system only if your threat model calls for it. They are powerful but more demanding to live with, and most people do not need that much.
Will my software run on Linux?
Most everyday tasks have a strong native equivalent or run through a compatibility layer, and web apps run unchanged in any browser. The honest exceptions are a few professional tools tied to Windows or macOS. List your must-have programs and check each one before you commit, since that is where surprises hide.
Is a private operating system hard to install?
Less than it used to be. A live USB lets you try the whole system with no changes to your machine, and modern installers are guided from start to finish. Dual-booting alongside your current system is a safe way to ease in while you confirm everything works.
Do these operating systems really collect no data?
The open-source ones here ship without telemetry, and because the code is public, that claim is checkable rather than a promise. That is the core difference from a mainstream system, where data collection is a default you can reduce but never fully remove.
Can I run one of these on an old laptop?
Often yes, and it is one of Linux's strengths. Lightweight distributions breathe life back into hardware that a current mainstream OS would crawl on. The high-security options ask more of a machine, so match the system to the laptop rather than forcing the heaviest one onto old hardware.
What is the difference between an amnesiac and a compartmentalised system?
An amnesiac system runs from a USB stick and forgets everything when you power off, which suits high-risk work on a borrowed machine. A compartmentalised system isolates each task in its own sandbox so a compromise in one place cannot reach the rest. They solve different problems, and you pick by which risk you are actually facing.