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View this page's source →A privacy-first, offline-first Linux operating system built on Debian Stable and KDE Plasma. Four pillars: privacy-first, security-conscious, portable-first, offline-first. Ships hardened by default: sysctl hardening and Mission OS's Rust system services are enabled automatically during install, no post-install script needed. Installer is Calamares, customized with Mission OS branding and a Python post-install module. No telemetry, ever.
The problem
Most privacy-oriented Linux distributions signal intent through aesthetics: dark terminals, green text, cyberpunk imagery. That's a signal to the wrong audience. It reads as "for experts only," and the UX usually lives up to it: unexplained toggles, dense options, security features you enable without understanding the trade-offs.
If you want a well-designed, modern desktop OS that also treats your privacy as the default rather than an add-on, the market is thin.
Mission OS is designed around the principles of any modern product: clarity, consistency, careful defaults, honest explanations. The visual direction takes cues from Apple, Proton, Arc Browser, Linear, Vercel, and Nothing.
Security hardening happens automatically: sysctl hardening and Mission OS's Rust system services are enabled during install, with no manual post-install script required. A separate Mission Hub app, for reviewing and adjusting security, privacy, and storage settings after install, is in early development.
Who this is for
The developer
Wants a Linux laptop that doesn't phone home to Ubuntu One or Snap Store telemetry. Wants apt + a real KDE Plasma desktop + Docker + VS Code + a browser that resists fingerprinting, all preconfigured. Mission OS ships all of that on first boot, no post-install hardening script needed.
The designer
Wants color-managed KDE, real font rendering, Blender / Krita / Inkscape / GIMP available in mission-store, and a wallpaper that isn't a stock corporate photo. Wants privacy without giving up a beautiful desktop. Mission OS treats the desktop as the product.
The systems engineer
Wants an audit-friendly Debian base with hardened defaults, LUKS2 + Argon2id disk encryption, secure-boot on, TPM-sealed unlock available, and a Signed-update path. Wants to read the diff between "vanilla Debian" and "Mission OS" and understand every deviation. Mission OS is GPLv3: every change is inspectable.
Four pillars
Sensible defaults, honest choices, no telemetry, ever. Firefox and Tor Browser preinstalled; Brave and Chrome optional.
Full disk encryption, Secure Boot, TPM, recovery keys: hardened automatically after install, no manual setup script needed.
Designed to travel: installable on the machines you actually use, with sensible driver and hardware defaults.
Core system components work without a network. The OS assumes you might not have connectivity, and doesn't degrade when you don't.
Installer experience
Welcome → Locale → Keyboard → Partition → Users → Summary → Finished. Seven screens, built on Calamares (the same installer framework used by several major Linux distributions) rather than a fully bespoke installer application.
Mission OS-specific work happens after the visible flow: a post-install step applies sysctl hardening and enables Mission OS's Rust system services automatically, so there's no manual hardening script to run after first boot.
Current status
Mission OS shipped its Open Beta in August 2026, installable today via the Calamares-based installer above. Development is on hold while other products take priority; the separate Mission Hub app for post-install management (settings, updates, recovery, driver management, diagnostics) stayed in early implementation when work paused.
