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COSMIC Files vs Caja: catalog facts
COSMIC Files	Caja
Free Free and open source, developed by System76.	Free Free and open source, developed by the MATE project.
Linux	Linux
Written in Rust Built for and integrated with the COSMIC desktop	Default, well-integrated file manager for MATE Extension interface for adding features
Linux only Designed around COSMIC, so less suited to other desktops	Linux only Best integrated with the MATE desktop rather than other environments
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	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.