SFTP Client for Windows + Seedbox: evoftp vs WinSCP vs FileZilla vs CuteFTP

The best SFTP client for Windows and a seedbox is the one that splits each large file across several SSH connections, because a single SFTP stream over a long-distance link rarely fills your line. That narrows the field to four: evoftp (free, segmented by default), WinSCP (free, segmented as an opt-in setting), Cyberduck (free, segmented above 100 MB with a merge step) and CuteFTP (paid, multi-part but built around FTP). FileZilla is free and familiar but never splits a file, and lftp does it all from a WSL terminal.

This round-up covers every SFTP client Windows seedbox users actually run: portable exe versus installer, what SmartScreen says about unsigned apps, how each stores your seedbox password, and which ones pull a 40 GB folder at line speed. Setup for our own client is in the evoftp guide; the server-side steps are in the SFTP setup guide.

What we judged

• Segmented downloads — one file over several connections at once.
• Price and licence — free and open source, or paid.
• Install footprint — portable exe or installer.
• Password storage — Windows-login encryption, master password, or plain text.
• Extras — resume, sync, remote edit.

evoftp — free, segmented by default, portable exe

What it is: our own open-source (GPL-3.0) SFTP client for Windows, macOS and Linux, version 0.2.0. The Windows build is a single portable evoftp-windows.exe — no installer, config in %APPDATA%\evoftp. Download from neo.myseedbox.site/share/evoftp/.

Segmented? Yes, every file over 8 MB, with no setting to find. Balanced profile: 4 segments per file, 3 files at once, 8 connections; “Long distance” uses 8 segments. Pieces are written straight into place, so there is no merge step. Resume uses a .evoftp-part sidecar: download the same file into the same folder again and it continues.

Price: free. Platforms: Windows 10/11 64-bit, macOS 11+, Linux AppImage. Passwords: DPAPI via Electron’s safeStorage, tied to your Windows login.

Caveats: no WebDAV or S3 (SFTP, FTPS and FTP only), no sync, no remote edit, no speed limit, single-stream uploads, and the builds are not code-signed, so SmartScreen warns on first run (see FAQ).

Verdict: the fastest route to line-speed seedbox downloads on Windows without touching a setting; skip it if you need FTP or sync.

WinSCP — the Windows workhorse, segmented if you switch it on

What it is: free, GPL, Windows-only SFTP/SCP/FTP/WebDAV/S3 client, actively maintained (6.5.6, March 2026). Commander or Explorer UI, synchronise with preview, scripting, internal editor.

Segmented? Only if you enable it: Preferences → Background → “Use multiple connections for single transfer”, then the sub-option “Use multiple connections for single file” with a size threshold. SFTP-only, and not available with some commands. Out of the box WinSCP parallelises files, not pieces of one file.

Price: free. Install: installer or a separate “Portable executables” package; the portable exe reads a WinSCP.ini beside itself.

Passwords: WinSCP’s docs say that without a master password “stored passwords can be easily decrypted by malicious software”. Set one in Preferences → Security for AES encryption; forget it and there is no recovery.

The bundle habit: many seedbox hosts hand out a zip with the portable WinSCP exe and a pre-filled INI. It works, but the INI carries your password unprotected and never updates itself. If you use one, set a master password, check for updates, and confirm the host and password still match your client area.

Verdict: the most capable free Windows client; it needs two checkboxes before it is fast for seedbox downloads.

FileZilla — familiar, free, never splits a file

What it is: free (GPL) FTP/FTPS/SFTP client for Windows, Linux and macOS. Site Manager, filename filters, directory comparison, speed limits, remote edit.

Segmented? No. FileZilla runs up to 10 file transfers at once, but one file always rides one connection. The developers have said “FileZilla doesn’t use segmented transfers” (forum thread 35292) and answered the request with “Never. There’s no need for it” (thread 24720).

Price: free; FileZilla Pro (paid) adds cloud protocols and directory sync. Install: installer. FileZilla’s own KB confirms the Windows installer can carry bundled offers (“vetted, premium products — for example, the Google Chrome browser”) and sells Pro as the clean installer. Read every installer screen.

Passwords: plain text in the Site Manager file by default. A master password (Settings → Interface → Passwords, since 3.26) encrypts them; it is off until you turn it on.

Verdict: fine for browsing and small files, the wrong tool for bulk seedbox downloads on a long link.

CuteFTP — paid, multi-part, built for FTP

What it is: the classic commercial Windows client, now sold by Fortra. Version 9.4.0 shipped April 2026 after an eight-year gap; the Mac version died in 2014.

Segmented? Yes — File → Download Advanced → Multi-part Download, HIGH (2 parts) or MAX. The docs describe splitting a file “over multiple FTP sessions”, call it “not recommended” over SSH or SSL because of CPU cost, and merged uploads need a server with COMB. On a seedbox you should be on SFTP, so the headline feature is discouraged on the protocol you need.

Price: $59.99 one-time, $89.99 with 12 months of support. Install: Windows installer. Passwords: Site Manager can be password-protected.

Verdict: only if you already own it or need FXP and scheduling.

Cyberduck for Windows — segmented, with a merge step

What it is: free, GPL, macOS and Windows client for FTP, SFTP, WebDAV, S3 and 30-plus cloud services. Sync with preview, remote edit, bookmark import from WinSCP and FileZilla.

Segmented? Yes, on by default: files over 100 MB are split across connections, then merged. The docs warn merging “may take a considerable amount of time” and only succeeds if every part downloaded.

Price: free with a donation prompt. Install: EXE or MSI installer, .NET Framework 4.7.2, no portable build documented. Passwords: Windows Credential Manager.

Verdict: best if you also need S3 or cloud drives; for pure seedbox pulls the merge step is the price.

lftp under WSL — the original segmented tool, no GUI

What it is: the command-line client whose pget -n technique evoftp reimplements. pget -n 8 file.mkv pulls one file over 8 connections; mirror --parallel=5 --use-pget-n=8 Movies/ does a folder; -c continues.

Segmented? Fully. Price: free. Passwords: ~/.netrc, plain text, so restrict the file to your user. Verdict: unbeatable for scripted pulls; painful for browsing a 5,000-file library.

Comparison table

Our pick and why

evoftp if what you do is pull finished downloads to your PC; WinSCP if you also edit config files, sync folders or script transfers. evoftp wins on the thing that matters most — it segments every file by default with no merge and no settings — and on the client-area connection file that connects in one double-click. WinSCP wins on everything else, and after two checkboxes it is fast too. Cyberduck is third if you also need S3. We would not use FileZilla for large downloads.

The gap is real on long links: in our tests a 250–700 ms RTT connection that managed about 2.4 MB/s per single SFTP stream reached line speed with 8 segments and a 16 MB window. Our measurements, not a promise. For other routes see transfer files from your seedbox.

FAQ

Is a portable exe safe to run?

Portable only means the program keeps its settings beside itself or in %APPDATA% instead of needing an installer; it says nothing about safety either way. Judge the source: evoftp is GPL-3.0, so the code is public, and the download comes from our own host. Use the link in the guide.

Why does SmartScreen block evoftp?

Because the build is not code-signed yet. Windows Defender SmartScreen shows “Windows protected your PC” for any unsigned exe with little download history. Click More info, then Run anyway. You see it once. Signed apps do not trigger it.

Which client stores my seedbox password most safely on Windows?

evoftp (DPAPI, bound to your Windows login) and Cyberduck (Windows Credential Manager) encrypt without extra steps. WinSCP and FileZilla encrypt only once you set a master password; leave it unset and the stored password is recoverable from the config file.

Get started

Download evoftp-windows.exe from neo.myseedbox.site/share/evoftp/, click through SmartScreen once, then grab the connection file from the “Desktop app” row in your client area and double-click it. Everything else, including the long-distance profile, is in the evoftp guide.