PuTTY

Spec sheet

What it does

PuTTY is an SSH client for remote terminal sessions and also supports serial connections, Telnet, Rlogin and SUPDUP.Read 11 Oct 2026 · chiark.greenend.org.uk

Free plan

YesRead 20 Sep 2026 · chiark.greenend.org.uk

Support

The maintainers say they cannot answer all support emails and recommend public forums or local experts for support questions.Read 11 Oct 2026 · chiark.greenend.org.uk

License

PuTTY executables and source code are distributed under the MIT licence.Read 11 Oct 2026 · chiark.greenend.org.uk

Additional utilities

The PuTTY suite includes PSCP, PSFTP, Plink, Pageant and PuTTYgen utilities.Read 11 Oct 2026 · chiark.greenend.org.uk

Current security update

The team says PuTTY 0.85, released 2026-08-16, fixes multiple security issues, including a potentially dangerous Pageant issue involving SSH agent forwarding.Read 11 Oct 2026 · chiark.greenend.org.uk

Download integrity

The team creates GPG signatures for files distributed from its website, and Windows executables and installers also contain built-in Authenticode signatures.Read 11 Oct 2026 · chiark.greenend.org.uk

File transfer

PSCP and PSFTP provide file transfer, and PSCP uses SFTP when possible, falling back to the older SCP protocol when needed.Read 11 Oct 2026 · chiark.greenend.org.uk

Maintainer

PuTTY is maintained by a small team based in Cambridge, England, with Simon Tatham as project originator and main developer.Read 11 Oct 2026 · chiark.greenend.org.uk

Password storage limit

PuTTY does not remember passwords in its settings.Read 11 Oct 2026 · chiark.greenend.org.uk

Proxies

PuTTY supports proxying via another SSH server and HTTP Digest authentication for HTTP proxies.Read 11 Oct 2026 · chiark.greenend.org.uk

SSH features

PuTTY supports public key authentication and port forwarding, and lets users reconfigure port forwardings during a session.Read 11 Oct 2026 · chiark.greenend.org.uk

Supported platforms

Windows and UnixRead 20 Sep 2026 · chiark.greenend.org.uk

Supported systems

Released PuTTY tools run on Windows and Unix; Windows executables are provided for x86 and Arm, while Unix is provided as source code.Read 11 Oct 2026 · chiark.greenend.org.uk

Terminal emulator

PuTTY includes an xterm terminal emulator.Read 11 Oct 2026 · chiark.greenend.org.uk

Unsupported mobile platforms

The team says it has no release-quality ports for Android, iOS or other systems beyond Windows and Unix.Read 11 Oct 2026 · chiark.greenend.org.uk

Plans and prices

Every PuTTY plan and price →

Where Specifiction places it

• Terminal apps#16 of 418.1
• SSH Clients#15 of 337.8
• Terminal Emulators#29 of 407.7