Replicant is a free and open source operating system (OS) based on the Android mobile platform and aims to replace all proprietary Android components with opensource components. Developed by Replicant Team
License: Open Source
Sailfish OS is a general purpose Linux used commonly as mobile operating system combining the Linux kernel for a particular hardware platform use, the open-source Mer core stack of middleware, a proprietary UI contributed by Jolla or an open source UI, and other third-party components. Developed by Jolla
License: Open Source
Sailfish OS is a user-friendly mobile operating system that supports Android apps and has a strong community, while Replicant is a privacy-focused, open-source OS that prioritizes user security but may lack in app availability and ease of use.