LineageOS is described as 'Free and open-source Android-based OS for smartphones and tablets that enables deep customization, regular security updates, privacy focus, and broad device compatibility' and is a very popular Mobile OS in the security & privacy category. There are more than 25 alternatives to LineageOS for a variety of platforms, including Android, Linux, Android Tablet, Linux Mobile and iPhone apps. The best LineageOS alternative is GrapheneOS, which is both free and Open Source. Other great apps like LineageOS are Android, iodéOS, /e/ and Ubuntu Touch.
GrapheneOS is a privacy and security focused mobile OS with Android app compatibility developed as a non-profit open source project. It's focused on the research and development of privacy and security technology including substantial improvements to sandboxing, exploit...
Open-source mobile OS developed by Google, based on the Linux kernel. It supports app development in Java and Kotlin. Compatible with various devices, offering seamless integration with Google services, customizable interface, and extensive app ecosystem for smartphones and tablets.
Android-based OS emphasizing privacy, open source transparency, tracker and ad blocking, independent app installation, digital sovereignty, community development, routine updates, environmental sustainability, and a familiar interface for alternative Android devices.
Fast, secure, private. Recommend it with CalyxOS, the best ones imo
Same with microG + adblocker + degoogled
/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.
Maintained for older phones (Samsung Galaxy S3 i9300), even less Google.
Ubuntu Touch is the Ubuntu operating system for mobile phones originally created by Canonical and now developed by the UBports Community.
It doesn't depend on Google at all (also regarding security updates)
It isn't based on Android. Needs VoLTE to be usable in US though.
Real GNU/Linux in your phone!
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".
postmarketOS extends the free and open source operating system Alpine Linux to run on smartphones and other mobile devices. Alpine is a security-oriented, light-weight Linux distribution based on musl libc and BusyBox.
Replicant is a fully free Android distribution running on several devices, a free software mobile operating system putting the emphasis on freedom and privacy/security. It is based on LineageOS and replaces or avoids every proprietary component of the system, such as user-space...
Plasma Mobile turns your phone into a fully open hacking device, just like a PC. You can join us to start building new mobile experiences now.
PixelOS is an AOSP based ROM, with Google apps included and all Pixel goodies. We aim to provide an experience similar to Google Pixel phones with numerous performance enhancements and a small amount of useful additional features.
Mobian is an open-source project aimed at bringing Debian GNU/Linux to mobile devices.
GNU+Linux Debian-based operating system
Canada
United States
France
EU
Germany
Switzerland
India
Focused on security and privacy instead of random options.