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PuTTY-CAC vs SuperPuTTY: catalog facts
PuTTY-CAC	SuperPuTTY
Free Free to download from the project's GitHub releases page.	Free Free and open source under the MIT licence.
Windows	Windows
SSH login with smart cards, CAC cards and certificates FIDO key support, including YubiKeys and passkeys	Tabbed interface for many PuTTY sessions Simple scripting for basic tasks
Windows only Interface keeps PuTTY's dated configuration dialogs	Windows only Depends on PuTTY being installed
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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