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KiTTY vs Solar-PuTTY: catalog facts
KiTTY	Solar-PuTTY
Free Free and open source under the MIT licence, like PuTTY.	Free Free to download and use.
Windows	Windows
Session filter and launcher, which PuTTY still does not have Automatic login and command scripts per session	Tabbed interface for many sessions at once Saved credentials and private keys for auto-login
Windows only Last release was September 2023, and it is based on PuTTY 0.76	Windows only Closed source, from a vendor that uses it to promote paid monitoring products
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.