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kitty vs Black Box: catalog facts
kitty	Black Box
Free Free and open source under the GPL.	Free Free and open source under the GPL-3.0 licence.
macOS, Linux	Linux
Inline image display through its own graphics protocol Kittens add diffing, hints, remote control and SSH integration	Native GTK 4 and libadwaita interface Uses the established VTE terminal engine
No Windows build Configuration is a text file with no graphical settings	Linux only Releases are infrequent
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-or-later
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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