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Photon OS vs Flatcar Container Linux: catalog facts
Photon OS	Flatcar Container Linux
Free Free and open source.	Free Free and open source, supported by project sponsors.
Linux	Linux, Self-hosted
Small footprint suited to container hosts Images for x86, ARM64, Raspberry Pi and major clouds	Read-only, immutable filesystem reduces the attack surface Automatic atomic updates
Aimed at servers and appliances, not desktop use Best integrated with VMware environments	No package manager, so extra software must run in containers Not intended as a general-purpose or desktop system
Operating system	Operating system
Open source	Open source
License not stated	License not stated
No account 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.