Alternatives to PureOS
Purism's free-software Linux operating system that converges between desktop computers and phones. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
PureOS
Purism's free-software Linux operating system that converges between desktop computers and phones.
Replacements
Listings that take over the same core job as PureOS.
Tails
Amnesic live operating system that routes everything through Tor.
Tails is an amnesic live system that routes everything through Tor, rather than an installed free-software desktop and phone operating system.
Kodachi
A privacy-focused Debian-based Linux distribution that routes traffic through Tor or VPN.
Kodachi is a Debian-based desktop with built-in Tor, VPN and DNSCrypt routing, but it is only partly source-available and maintained largely by one developer.
Whonix
Two-virtual-machine system that isolates the desktop from the network.
Whonix isolates the desktop from the network using two virtual machines on an existing host, instead of running as a standalone operating system.
Also worth comparing
These listings name PureOS as their own alternative, so the relationship runs both ways.
Alpine Linux
A small, security-oriented Linux distribution built on musl libc and BusyBox.
PureOS is a fully free-software Linux system that runs on both laptops and Librem phones, and it is closely tied to Purism hardware rather than minimal servers.
GNU Guix
A transactional package manager and GNU/Linux distribution whose packages and system configurations are written in Guile Scheme.
PureOS is also a fully free-software Linux system, but it drops Guix's Scheme-based reproducible configuration and is closely tied to Purism's laptops and phones.
Similar software
Related functionality, not a direct replacement.
StartOS
A server operating system for discovering, installing and running open source services on a personal server.
Gadgetbridge
Open-source Android app that pairs and manages smartwatches, bands and other Bluetooth gadgets without vendor apps.
NextPush
An Android UnifiedPush distributor that delivers push notifications through your own Nextcloud server.
LineageOS for microG
Unofficial LineageOS builds with microG and F-Droid included, for Android without Google Apps.
GNU IceCat
The GNU Project's build of Firefox containing only free software, with added privacy extensions.