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

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