A security and privacy focused mobile operating system compatible with Android apps
  • Protection from zero-days
    Prevents many vulnerabilities and makes exploits harder
  • Hardened C standard library and compiler toolchain
    Catches memory corruption and integer overflows
  • Hardened kernel
    Kernel self-protection and high quality ASLR
  • Stronger sandboxing and isolation for apps & services
    Stricter SELinux policies, seccomp-bpf and more
Nexus Nexus
  • Backported security features and quicker patching
    Benefiting from upstream changes long before stock
  • Firewall & network hardening
    Along with improvements like MAC randomization
  • Open-source and free of proprietary services
    Uses alternatives to Google apps/services like F-Droid
  • Security-centric user experience changes
    Better defaults, finer-grained permission control
See the technical overview for an in-depth look.


Which devices are currently supported?

CopperheadOS currently supports the Pixel, Pixel XL, Nexus 5X and Nexus 6P. HiKey and HiKey 960 support is available as a demo. Sources are published for all devices and the official Nexus 5X and 6P builds are similarly free for non-commercial use.


Which devices will be supported in the future?

Devices need to meet strict security requirements to be considered. The requirements are a moving target and past devices like the Nexus 5X and 6P are far from meeting our current standards. See the documentation on minimum hardware requirements for details.


How long will devices be supported?

Devices are guaranteed to be supported until the vendor drops support, preventing full security updates by anyone else due to lack of updated firmware and making it impractical to properly maintain the rest. For current generation devices, major version upgrades and security updates are guaranteed for at least three years. It's common for devices to receive at least a few extra months of support.


Is it stable?

The core functionality of the operating system is very stable. There are likely rarely used components of the operating system that are broken due to latent bugs in Android uncovered by CopperheadOS exploit mitigations.

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