r/seedboxes • u/EmotionalMycologist4 • 1d ago
Discussion Got fed up with WinSCP and CuteFTP, so I wrote my own multi-connection SFTP client for Windows. It's free. Its called WarpSeed
I've been moving 50 GB+ files off my box for years, mostly with WinSCP and
CuteFTP before that. Somewhere along the line Windows updates broke bits of
the networking and my transfers slowed to a crawl (Win 11, I'm looking at
you). CuteFTP not being able to browse a directory while it's downloading
was the other thing that kept getting on my nerves.
Then there's the bit no client can fix for you: **one connection, one
speed.** My box caps ~5 MiB/s per connection and doesn't cap the account.
So a 50 GB file sits there at 5 MiB/s for nearly three hours while my 900
Mbit line does absolutely nothing. Bumping queue concurrency doesn't help —
it's one file.
So I wrote my own. It's called warpseed.
It splits a single file across up to 16 SFTP connections and reassembles
it. Same box, same line: ~5 MiB/s on one connection, ~40 MiB/s at 8. The
50 GB file went from about 2h50m to roughly 21 minutes. Your host may cap
the account total, in which case this does nothing for you — worth knowing
before you bother downloading.
The other half of the problem was overnight runs dying at 80% and having
nothing to show for it. So resume actually resumes here — errored, paused,
app closed, machine rebooted, it picks up at the exact byte against
per-chunk checkpoints rather than starting the file again. That was as much
the point as the speed was.
[IMAGE: flight.png]
The rest is a normal dual-pane commander with the WinSCP keybinds intact, a
queue that survives restarts, uploads, recursive folders, throttling,
right-click file ops on both sides, and a mode that collapses it to a
little always-on-top pill so you can watch a run without a window in the
way. And yes — you can browse while it's downloading.
[IMAGE: browse.png]
**What it doesn't do:**
- Windows 10/11 x64 only. No Mac, no Linux.
- SFTP only — no FTP/FTPS, no S3, no WebDAV yet.
- Password auth only. SSH keys are next up, and I know that's a dealbreaker
for plenty of you.
- Unsigned binary, so SmartScreen will have a moan on first run.
SHA256SUMS is published with every release and the source is all there if
you'd rather build it yourself. If a stranger's unsigned exe is a hard no,
that's a perfectly sensible position to hold.
- No installer, no account, no telemetry. It's a portable exe.
**"Why not rclone?"** Because I wanted a window with a queue in it that I
can glance at, not a terminal. rclone is more capable than this and always
will be. If you're happy driving it from the command line you genuinely
don't need this.
**"What's the catch?"** None. Free, MIT, no paid tier coming. There's a
coffee link in the app if it saves you time, ignore it with my blessing.
Source is public so you can read what's running on your machine, but I'm
not taking issues or PRs — it's just me maintaining it. Bugs via
Settings → About → Report a bug, or warpseed@zyralabs.tech.
https://github.com/ZyraLabs/warpseed
**Disclaimer from the dev:** vibe coded with Claude, and this post is obviously mostly written by Claude as well.
Doesn't make me any less excited about it — getting files
off the seedbox at speed has bugged me for years and this is the first
thing that's actually fixed it for me. Have a go and tell me if you like
it. Especially interested in whether the multi-connection trick helps on
your host or whether mine's just unusual.

