Compare software

Flatcar Container Linux vs Fedora CoreOS: catalog facts
Flatcar Container Linux	Fedora CoreOS
Free Free and open source, supported by project sponsors.	Free Free and open source, developed by the Fedora community.
Linux, Self-hosted	Linux, Self-hosted
Read-only, immutable filesystem reduces the attack surface Automatic atomic updates	Automatic updates Minimal image focused on containers
No package manager, so extra software must run in containers Not intended as a general-purpose or desktop system	Not a general-purpose or desktop system Provisioning works differently from a traditional server install
Operating system	Operating system
Open source	Open source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.