LineageOS is described as 'A free and open-source operating system for smartphones and tablet computers, based on the Android mobile platform. It is the successor to the highly popular custom ROM CyanogenMod, from which it was forked in December 2016 when Cyanogen Inc' and is a very popular Android ROM in the os & utilities category. There are more than 50 alternatives to LineageOS for a variety of platforms, including Android, Android Tablet, Linux, Linux Mobile and Android-x86. The best alternative is Android, which is both free and Open Source. Other great apps like LineageOS are Ubuntu Touch, /e/, GrapheneOS and Replicant.
LineageOS is mainly a Android ROM but alternatives to it may also be Operating Systems or Mobile OSs. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of LineageOS.
Ubuntu Touch is a mobile version of the Ubuntu operating system for mobile devices. It is adapted to run naturally in a mobile, touch-screen environment but is also capable of functioning as a desktop computer while in "desktop mode".
Ubuntu Touch vs LineageOS opinions
Almost everyone thinks Ubuntu Touch is a great alternative to LineageOS.
It doesn't depend on Google at all (also regarding security updates)
/e/ is a fork of LineageOS that aims to be completely free of everything Google. Not only that, but there are a number of goals the developer has in mind for /e/ that more people feel are vital to a mobile operating system.
/e/ vs LineageOS opinions
Almost everyone thinks /e/ is a great alternative to LineageOS.
Maintained for older phones (Samsung Galaxy S3 i9300), even less Google.
Everyone needs a phone. Not everyone wants governments and corporations tracking their every move and spying on their communications. CalyxOS lets you have your cake and eat it too, with "Privacy by Design".
Resurrection Remix ROM is ultimately full featured, stable and combined with the best features of open source roms. We are also providing lot of awesome original Resurrection Remix ROM add-on s in the builds.
Almost everyone thinks Resurrection Remix OS is a great alternative to LineageOS.