LICENSEWARE
PuTTY Rule

Modification and incorporation into commercial products permitted with notice retained

Catalog row in Vendor License Rules · Cited

Kind
Redistribution
Statement
The licence grants the rights to modify and merge the Software. The licence page states that, apart from maintaining the copyright notice and the licence text in derivative products, anybody (even companies) can adapt the PuTTY source code into their own programs and products, including commercial products, and owe nothing. (Licence page undated; last modified 2026-08-16; retrieved 2026-09-27)
Applies when
Forking PuTTY or reusing PuTTY source code in an in-house or commercial product.
Applies to
PuTTY source code adapted into other programs
Aliases
derivative works; forks; code reuse
Esc