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KiTTY vs SecureCRT: catalog facts
KiTTY	SecureCRT
Free Free and open source under the MIT licence, like PuTTY.	Paid Commercial licence required after a free evaluation.
Windows	Windows, macOS, Linux
Session filter and launcher, which PuTTY still does not have Automatic login and command scripts per session	Runs on Windows, macOS and Linux Regular-expression keyword highlighting
Windows only Last release was September 2023, and it is based on PuTTY 0.76	Paid licence after the evaluation period Closed source
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
No account needed	Not stated if an account is 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.