Privacy. The stock Android ROMs are often packed with analytic tools that only benefit the phone vendor. CopperheadOS has disabled the features that phone back data to corporations. It also does not come pre-loaded with any of Google’s proprietary software such as the Google Play Store, GCM etc.

Hardened operating system! The kernel has been improved to accommodate self protecting features, the standard C library and compiler toolchain have received several security patches. SELinux policy has been fine tuned to act stricter, providing greater sandboxing and isolation of applications and services.