Privacy focused Android alternatives
Android stock versions
GrapheneOS offers a higher level of privacy and security. (Pixel phones)
CalyxOS is hardened for more privacy and security. (Pixel phones, Xiaomi Mi A2)
Replicant, an Android distribution with an emphasis on freedom, privacy, and security.
LineageOS for phones and tablets.
/e/ building privacy-enabled smartphone operating systems.
Based on Linux
Ubuntu Touch, a mobile version of the Ubuntu operating system.
Plasma Mobile, Linux-based.
Sailfish OS, Linux-based mobile OS.
Librem 5, a phone that focuses on security by design and privacy protection by default. Outfitted with hardware kill switches and specially designed hardware, and (currently, 2022), a lead time for new orders of 52 weeks.