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PuTTY vs OpenSSH: catalog facts
PuTTY	OpenSSH
Free Free and open source under the MIT licence.	Free Free and open source under a BSD-style licence.
Windows, Linux, macOS	macOS, Linux, Self-hosted, Command line
One small executable that runs without installation A full suite: PSCP and PSFTP for files, Plink for scripts, Pageant as a key agent	Complete client, server and key management suite Port forwarding and tunnelling built in
The interface shows its age next to modern terminals There is no Mac port from the project; the Unix build is X11-based	Command-line only with no graphical interface Configuration options take time to learn
Downloadable app	Downloadable app, Self-hosted
Open source	Open source
License: MIT	License: BSD-style
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 23, 2026

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