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PuTTY vs KiTTY: catalog facts
PuTTY	KiTTY
Free Free and open source under the MIT licence.	Free Free and open source under the MIT licence, like PuTTY.
Windows, Linux, macOS	Windows
One small executable that runs without installation A full suite: PSCP and PSFTP for files, Plink for scripts, Pageant as a key agent	Session filter and launcher, which PuTTY still does not have Automatic login and command scripts per session
The interface shows its age next to modern terminals There is no Mac port from the project; the Unix build is X11-based	Windows only Last release was September 2023, and it is based on PuTTY 0.76
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 21, 2026

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