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KiTTY vs OpenSSH: catalog facts
KiTTY	OpenSSH
Free Free and open source under the MIT licence, like PuTTY.	Free Free and open source under a BSD-style licence.
Windows	macOS, Linux, Self-hosted, Command line
Session filter and launcher, which PuTTY still does not have Automatic login and command scripts per session	Complete client, server and key management suite Port forwarding and tunnelling built in
Windows only Last release was September 2023, and it is based on PuTTY 0.76	Command-line only with no graphical interface Configuration options take time to learn
Downloadable app	Downloadable app, Self-hosted
Open source	Open source
License: MIT	License: BSD-style
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

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