You’re about to upgrade a stack of access switches. You need to log in, check the current image and free flash, push a new image file, and pull the running configs off as a backup before anything reboots. That’s two different jobs: an interactive CLI session and a file transfer. PuTTY and WinSCP are the classic Windows pair for exactly this split, and the question “which one?” usually turns into “which one for which step?”. This page lays out where each tool starts and stops, where they genuinely overlap, and how to wire them together so you’re not typing the same credentials twice.
At a glance
| PuTTY | WinSCP | |
|---|---|---|
| Primary job | Interactive terminal (SSH, Telnet, serial, raw, rlogin, SUPDUP) | File transfer and remote file management |
| Licence | MIT | GPL v3 or later |
| Cost | Free | Free |
| Author | Simon Tatham and team | Martin Přikryl |
| Current release (at time of writing) | 0.85 (Aug 2026) | 6.5.7 stable (Sep 2026); 6.6.x in release-candidate |
| Platforms | Windows; Unix builds also exist | Windows only |
| File protocols | PSCP/PSFTP command-line tools (SCP/SFTP) | SFTP, SCP, FTP/FTPS, WebDAV, Amazon S3 |
| Serial console | Yes | No |
| GUI file browser | No | Yes — Commander (two-pane) or Explorer-style |
| Directory synchronisation | No | Yes, manual or “keep remote up to date” |
| Built-in text editor for remote files | No | Yes |
| Scripting | Plink for remote commands; PSCP/PSFTP for files | winscp.com scripting, CLI, .NET assembly |
| Key authentication | PuTTYgen keys (.ppk), Pageant agent | Uses .ppk keys and Pageant too |
| Session storage | Registry (per user) | INI file or registry; can import PuTTY sessions |
| Portable use | Single executables, no install needed | Portable use documented by the vendor |
The real differences
Interactive shell vs file operations
PuTTY is a terminal emulator. It’s where you type show version, paste config snippets, watch a boot over a console cable at 9600 baud, and scroll back through a long show tech. It does this with very little ceremony and has done so for decades, which is why it’s still the default on so many Windows admin machines.
WinSCP never gives you a real terminal. It has a “console” window for sending single commands, but it’s no substitute for an interactive session — no paging, no tab completion on a switch CLI, no serial. What it gives instead is a proper file manager over SSH and other protocols: drag and drop, queue transfers, resume, compare directories, edit a remote file in place and save it back.
Where they overlap
PuTTY’s suite includes PSCP and PSFTP, command-line tools for SCP and SFTP. For a quick one-off copy in a script they’re fine:
pscp -i C:\Keys\netadmin.ppk c:\images\switch-image.bin netadmin@10.20.99.11:flash:/For anything beyond that — a nightly pull of configs from a dozen devices, or synchronising a folder — WinSCP’s scripting is a better fit, with logging and explicit host-key pinning:
winscp.com /ini=nul /log=C:\Logs\cfgpull.log /command ^
"open sftp://backup@10.20.99.5/ -hostkey=""ssh-ed25519 255 xxxxxxxx..."" -privatekey=C:\Keys\backup.ppk" ^
"get /configs/*.cfg C:\Backups\configs\" ^
"exit"Note that many network devices expose SCP but not SFTP, or neither until you enable it (ip scp server enable on Cisco IOS, for example). WinSCP speaks both; pick the protocol per site.
Keys, sessions and integration
They share the same key format and the same agent. Generate a key once in PuTTYgen, load it into Pageant, and both tools authenticate without prompting. WinSCP can import your saved PuTTY sessions (Tools → Import Sites in the Login dialog), and from any open WinSCP session Commands → Open in PuTTY launches a terminal to the same host. If you already have a tidy PuTTY session list — see our PuTTY sessions guide — WinSCP can reuse it in a couple of clicks.
WinSCP also bundles PuTTY’s SSH code, which is why its release notes regularly mention “security fixes from PuTTY” — the two projects move together on crypto.
Automation and scale
PuTTY’s scripting story is Plink: run a command on a remote host and capture the output, useful for simple checks from a batch file. WinSCP’s is broader: a documented scripting language, a CLI with exit codes, and a .NET assembly you can call from PowerShell for real error handling. For a small team automating config backups without a dedicated NCM product, WinSCP scripts plus Task Scheduler are a common and workable pattern.
Footprint
Both are free for any use, both are small, and both are commonly deployed to every admin workstation with no licensing conversation at all. The only real decision is whether to deploy them as managed packages or keep portable copies on a toolkit drive; in either case, get them only from the authors’ sites (see where to get them).
Verdict
Pick PuTTY if…
- you need an interactive CLI on switches, routers, firewalls or Linux boxes;
- you work over console cables and serial adapters;
- you want saved sessions with per-device logging, launched from shortcuts.
Pick WinSCP if…
- you move files: firmware images, config backups, logs, certificates;
- you want a visual two-pane file manager over SFTP/SCP, or FTP/WebDAV/S3 as well;
- you need scripted, logged transfers or folder synchronisation.
Keep both if you do network or server administration from Windows at all. They’re designed to work together, share keys and sessions, and cost nothing. The real comparison isn’t PuTTY versus WinSCP; it’s terminal plus file transfer versus doing one of those jobs badly.