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SecureCRT vs KiTTY: catalog facts
SecureCRT	KiTTY
Paid Commercial licence required after a free evaluation.	Free Free and open source under the MIT licence, like PuTTY.
Windows, macOS, Linux	Windows
Runs on Windows, macOS and Linux Regular-expression keyword highlighting	Session filter and launcher, which PuTTY still does not have Automatic login and command scripts per session
Paid licence after the evaluation period Closed source	Windows only Last release was September 2023, and it is based on PuTTY 0.76
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
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 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.